There are lots of PS2 games that I'm still playing, but not a whole lot I'm interested in that I haven't. I like replaying Okami, Odin Sphere, DQVIII, all 3 Ratchet games, and Dark Cloud 2 a lot.
Okami I can get for the Wii when that releases so 1 game down.
Odin Sphere's spiritual successor Oboro Muramasa is hitting the Wii so that's 2 games down.
I'll stop playing DQVIII when DQIX hits so that's 3 games down.
I could buy F:ToD when I get a PS3 so that would take care of my Ratchet desires.
Sony seems to have given up on making new Dark Cloud games so that one I may have to just accept will never have a sequel. ;_;
Now NiGHTS is hitting so I'll obviously have to keep my PS2 active to play and beat it. I do still have the original Saturn version but it's in storage back home. I don't keep anything but my Wii, PS2, DS, and PSP with me in my apartment.