Looks like Marc Miller has started shipping books of Traveller 5 to the pre-orders.
RPGSite Thread - Here are some pics and various posts about its contents.
From that thread, it looks like I won't be buying the game. I'm really glad that Marc finally finished it and got Trav5 published, but the game is very different from Mongoose Traveller, which is my personal favorite (though I did like the Traveller: New Era setting, its rules were terrible).
For those of you who are long-time Traveller fans, this is probably a must-buy. I just wanted to spread the word that the book is now shipping.