Sequels, sequels, sequels! We're going mad with sequels over here!
As if it wasn't already enough, Capcom has tossed in its own offering, Viewtiful Joe 2. The original garnered a cult following for its unique old school fundamentals, and the sequel follows the same line (perhaps a little too closely). At any rate, when you get the time, check this title out.
GameCube
PS2
Engadget
TUAW