Happily, the H2G2 remake has now been released and you can download it from its official site. For free of course. As for its title, well, you'll be shocked to find out its none other than the rather apt The Hitchhiker's Guide to the Galaxy Remake. Oh, yes, and it's a pretty radical remake too, as it transforms the parser-based, text-only game into a proper, graphical, mouse-driven, point-and-click adventure.
The surreal, colorful, low-res and quite abstract graphics of the remake are generally excellent and more than appropriate to the theme, whereas the new interface works like a charm. What's more, the remake is extremely faithful both to the book and the original game, and manages to fully and successfully translate the game and its puzzles into a new genre. It even makes the thing actually playable (without a walkthrough) by non-superhuman adventurers through the implementation of two difficulty modes, a streamlined interface, quite a few subtle clues, the removal of most dead-ends and some smart design ideas. As for the soundscape of the game, well, it's more than memorable and appropriate.
So, yes, I do suggest you try said remake. Even if you've never played the original. Even if you never actually found out who Douglas Adams was. Just don't expect it to be over in a couple or so hours. Expect t to be extremely funny.