Here's my yearly contribution to the adventure game list of 2009.
And thanks, flotsam, for making this last again
The Longest Journey (the first one)
Syberia (the first one)
Sherlock Holmes: The Awakened
Shivers 2: Harvest of Souls
Rhiannon - the curse of the four branches
Broken Sword (the first one)
Runaway (the first one)
Escape from Monkey Island
Agon- The Lost Sword of Toledo
Gilbert Goodmate and the Mushroom of Phungoria
As you can probably see, this year, more modern games have made it to my list than last year, I think? This is because I've found that the state of adventure games really is getting better.