I make posts like this once in awhile to remind myself later of the games that have released that I need to buy... but haven't yet. Right now, I'm flat broke, so the list will probably grow quite a bit in the short term. Here it is:

Beautiful Katamari (Xbox 360)
BioShock (Xbox 360)
Blue Dragon (Xbox 360)
Castlevania: The Dracula X Chronicles (PSP)
Contra 4 (DS)
God of War II (PS2)
.hack//G.U. Part 3 (PS2)
Halo 3 (Xbox 360)
The Legend of Zelda: Phantom Hourglass (DS)
Mega Man ZX Advent (DS)
Metroid Prime 3: Corruption (Wii)
Phoenix Wright 3 (DS)
Super Mario Galaxy (Wii)
Touch Detective 2 1/2 (DS)
Zack & Wiki (Wii)

I'll add more titles as they release and I can't buy them... My list is actually pretty short right now. There just aren't as many hot games coming out at the moment.