For anyone who might have missed the Titanic exhibit a couple years ago, the exhibit is currently at the Queen Mary. It doesn't say how long it's going to be there, and the ticket price is a bit more expensive, but that might be because it's 3 years later and that it's at the Queen Mary as opposed to the California Science Center.
Here's the Titanic page:
http://www.queenmary.com/titanic.php, and here's the page of prices, which includes different combo tours:
http://www.queenmary.com/attractions.php?page=prices.
I've also got a write-up from when we saw the exhibit in 2003 posted here:
http://www.colddeadfish.net/entertai...icexhibit.html.