As a person who doesn't like sports games, NBA Jam across all platforms old and new is awesome. The Wii version is pretty good, but I imagine the 360 and PS3 version will be even better because of HD, online, and achievements plus better controller mapping.
NBA Jam was one of my favorite sports games growing up...and I hate sports.
Same with NFL Blitz 2000.
Never played the original, and with money being tight around here, I think I'll pass on NBA Jam.
Basketball doesn't really interest me, anyway.