Titanic is sailing back into theaters in 3D and IMAX 3D format worldwide on April 6, 2012. The film's official Facebook page has over 14 million "Likes" and the original release ranks number two in worldwide box office at over 1.8 billion, topped only by James Cameron's Avatar at over 2.7 billion, so we can expect all things Titanic to gain renewed interest. IMDB has this great page of facts and trivia. Here is James Cameron discussing the re-release:

 
 
 If you were thinking of booking a cabin on the 12-night Titanic Memorial Cruise, departing April 8th from Southampton, you have as good as missed the boat. As Daily Mail reports in this article, the cruise ship Balmoral is sold out. 

However, although five cabin grades aboard the Azamara Journey have already sold out for the 8-night 100th Anniversary Cruise, departing New York on April 10th, it still has staterooms and suites ranging from $4,900 $14,850 available at the time of this writing. Itineraries for the Balmoral and Azamara Journey include memorial services on the day of and at the site of Titanic’s sinking. Here is a short video clip from The Travel Channel providing a brief glimpse of just a couple of events the passengers aboard the Balmoral will enjoy.
 
 
Here is a selection of descriptive excerpts from the RMS Titanic, Inc. website:

RMS Titanic, Inc, a subsidiary of Premier Exhibitions, Inc. serves as the exclusive steward of RMS Titanic,
which tragically sank on April 15, 1912. The Company is dedicated to preserving the legacy of the Ship, wreck site and all her passengers and crew through educational, historical, scientific and conservation-based
programs.

Since 1987, RMS Titanic, Inc. has honorably conducted seven research expeditions to the wreck of Titanic,
exclusively recovering and conserving more than 5,500 artifacts. Utilizing these recovered objects in concert with scientific data and historical research, RMS Titanic, Inc. brings to the general public the celebrated and moving experience: Titanic: The Artifact Exhibition
 
Seen by more than 25 million visitors worldwide, this blockbuster exhibition invites guests to experience the unparalleled grandeur and innovation of Titanic amidst detailed room recreations and countless stories of that fateful night. The exhibition continues to engage new generations in the drama of this magnificent liner, to experience life’s fragility and to commemorate the centennial of the maiden voyage.

RMS Titanic, Inc is committed to engaging the global community in Titanic’s story from its beginnings in 1909, her maiden voyage in 1912, the tragedy of her sinking, the aftermath of the countless lives that were inexorably altered and to the unfolding discoveries of the 21st century. Join us on this intriguing journey as we continue to investigate, consider, celebrate and remember this timeless and iconic moment in history.

Here is a list of current and upcoming exhibitions:

Permanent Exhibitions
Titanic Las Vegas
The Luxor Hotel and Casino

Titanic The Experience
Orlando, International Drive

Current Exhibitions
Titanic San Diego – Closes September 9, 2012
San Diego Natural History Museum

Titanic Regina – Closes March 4, 2012
Saskatchewan Science Centre
  
Titanic Singapore – Closes April 29, 2012
ArtScience Museum at Marina Bay Sands
 
Upcoming Exhibitions
Titanic Kansas City – Opens March 3, 2012
Union Station
  
Titanic Detroit - Open March 31, 2012
The Henry Ford Museum
                                                                                                        
NBC Action News offers this preview of the Titanic Exhibition opening March 3rd in Kansas City:
 
 
From this Daily Mail article dated January 31, 2012:
When the body of Titanic’s bandmaster, Wallace Hartley, was recovered, it was said that he had been found with his violin strapped to his chest. An enduring mystery of the missing violin began when there was no mention of his violin in the records of his effects.

Now a person living in the UK, who is not a relative of Wallace Hartley, claims to own the violin. The owner states that the violin was given to the bandmaster’s fiancée, Maria Robinson. Supporting evidence is a 1912 diary where she has apparently drafted a letter to the authorities in Nova Scotia thanking them for acceding to her wish to have the violin sent to her. The draft letter in Maria Robinson’s diary reads: 'I would be most grateful if you could convey my heartfelt thanks to all who have made possible the return of my late fiance’s violin. May I take this opportunity to express my appreciation to you personally for your gracious intervention on my behalf.'

Leading Titanic memorabilia auctioneer, Henry Aldridge and Son, is currently handling the violin believed to be Hartley’s. The Devizes-based firm holds every record set for items from the ship and are considered the world’s leading authority on its artifacts. They have so far spent thousands of pounds seeking to establish beyond any doubt that the violin is the genuine article.

The violin itself was stored in a brown leather case with the initials W.H.H. stamped on it and an inscription on the tail piece reading: ‘For Wallace on the occasion of our engagement from Maria.’ Mr Henry Aldridge said today: 'We are waiting the results of further laboratory tests.’ ‘The owner has not made up their mind if they would want to sell it but I think it is more likely it will go on exhibition - if it is proved to be genuine.’ 'We hope to have a definite answer sometime this year. We cannot rush the scientists.'
 
 
As detailed on this web page from the website of auctioneers Guernsey’s New York, there will be an unprecedented auction on April 11, 2012 of artifacts recovered from the wreck site of the Titanic and related intellectual property and intangibles, precisely one hundred years to the day of Titanic's maiden voyage. Guernsey's will be offering all of the assets and rights of RMS Titanic, Inc., a division of Premier Exhibitions, Inc. (NASDAQ: PRXI), which for 18 years has served as steward and salvor-in-possession of Titanic and its wreck site. 
 
The 5,000 plus artifacts retrieved from the Titanic wreck site through seven research and recovery expeditions from 1987 through 2010 and an extensive and unprecedented array of still and video imagery of the ship wreck site will be sold as one single collection. These assets include, among other things, video of the dives, 3-D images of the ship, and the first and only comprehensive survey map of the wreck site. The purchaser may also have the opportunity to assume the role of steward of the Titanic, to protect and preserve the wreck site for future generations. 

The sale is subject to certain covenants and conditions to ensure the collection will be properly maintained and available for public display. A 2007 appraisal, which included the artifacts and certain elements of RMS Titanic, Inc's intellectual property, also a part of this auction, were valued at $189 million. It is already being viewed as one of the most significant bodies of material ever to be offered at auction.