GamePro most likes Vortex with a 4.25 Fun Factor, seemingly out of a maximum five of fun, while Mahjong was worth only 2.0 of fun. All nine launch games are rated.
The article also mentions how the controls work on the titles without circular, wheel-ready gameplay; change directions in Pac-Man by tapping the corresponding side of the wheel, and use the buttons to rotate Tetris blocks. We're looking forward most to new games developed for the wheel, rather than old ones that try to graft their controls on the iPod. Bring on plate spinning, virtual hula-hooping, and competitive record scratching. Also, we want driving.