Yeah, I'll probably end up getting one very soon. I think I'll get the Tennis bundle and maybe the bass fishing game, as it seems to be the hardest to find other than the J-Mat, which is still commanding a high price tag. The games are so expensive because all of the processors and the CPU is in the cart itself, not the system.
An RPG would have been awesome, but not exactly the audience they were aiming for. The entire games list is on Wikipedia:
* Bowling
* Tennis
* Baseball
* Golf
* Power Boxing
* J-Mat
* Bass Fishing
Too bad on the East Coast/Midwest the only place to get them is Tuesday Morning. Fry's has them, but they are still selling them for $75.