Xbox 360 and PS3 is getting a version called NBA Elite 11
No, that's not quite true. People who purchase NBA Elite 11 (EA's former NBA LIVE series renamed) will get a "free" download voucher for NBA Jam for their respective system. Supposedly, they will not be selling the game through any other means on either system, so if you want NBA Jam on PS3/Xbox... you gotta pay 60 bucks for a game you may or may not want.
Personally, that's precisely why I'm not buying it. I am not going to inflate sales for a game I don't want, and won't actually play, just to get the game I actually do want. I'll wait them out. Sooner or later, EA will release Jam as a downloadable title on PSN/Live... unless they really hate money.
Edit: Ninja'd by amendonz But I will add that the HD versions WILL have online play... I believe the Wii version is the one that's incomplete in this case.