The embargo lifted today. Surprised no one's tallking about this.
A quick summary of new info:
Remote + Nunchuk: Move with analog, flick remote up to jump, flick down to shoot/dunk. Buttons modify shot types.
Remote only (sideways): D-pad moves, buttons shoot/dunk/etc. No motion controls.
Classic Controller: same.
Classic Campaign: Plays just like you remember it in the arcades.
Remix Tour: Powerups, boss battles, dynamic camera triggered by spectacular plays. "this would be the Dynasty mode if Nintendo were to design it."
o Magic Johnson and Larry Bird are bosses
o big head mode and other familiar goodies will be back
o Achievement system. Getting achievements will unlock goodies.
o Still no online...yet (not entirely out of the question says dev)
GamePro: Developer interview (video)
1UP: Hands on
IGN: Hands on
Kotaku: Hands on
Joystiq: Hands on
Destructoid: Hands on
5 reasons why the new NBA Jam will win you over again