As fun as NBA Jam truly is, the lack of the ability to swap players on-the-fly takes away from the overall experience quite a bit. If you get as angry as I do while playing and can't switch players, I have great news for you.
EA has announced that the PSN/XBLA version of NBA Jam (On Fire Edition), will feature a "tag mode" that will allow you to switch players. Along with that, they are going to take the high-flying dunks and swats of past and make them even more ridiculous.
To make the game even more tempting, it's going to be downloadable and will most likely be $15-$20, rather than $50 like the last release.