Modern Maniac Mansion
Wired.com is reporting on a Modern remake of classic adventure game Maniac Mansion. From the article: "The new game is almost identical to the original, except for the graphics and sound. Like the original, it has seven characters you can assemble in groups of three to play the game, and the puzzle-filled adventure has eight different solutions, which vary based on which characters you choose."
Typing got cumbersome sometimes, but the later games where you could point/click were a great improvement.
Police Quest? Gold Rush?
Check out the older stuff here:
http://www.if-legends.org/~adventure/Sierra_On-Li
Even independent games like Hugo were a ton of fun.
And from the Freeware side of things probably around 10-20 others many based on AGS (I am not even counting the text adventures in here) some of them with very good production values.
Almost twice as many releases than in 2003 sounds like a dead genre to me. Adventure games are as dead as BSD.