We last mentioned this book back in 2005, when the text was available as a series of drafts, and LtU user raould updated the post back in late August letting LtU readers know you can get it from MIT Press, but to be sure: the book is out. Not to play favorites, but Amazon currently has it new for $54 USD, and it retails for $75 USD. Powell's currently has one copy in stock as well (thanks Tim!).

And it's massive. At 1,322 numbered pages, it'll take me a while to get through, but I hope to post a review once I'm done. LtU readers might be interested to know that the book is based on and is now used in MIT's graduate programming languages course, 6.821.