I've complained before on WCG (1, 2) about the fact that LeapFrog hasn't opened the Leapster platform to third party developers. Instead, LF apparently develops the titles in-house.

But I just discovered that game studio The Diversion Group out of California appears to have created the Math Baseball Leapster title (playable demo here). What's strange is that the studio just announced its opening this month, but their website dates the release of the Math Baseball title to March 21, 2003, over a year ago.

Anyway, my suspicion is that LeapFrog hired Diversion Group to create this title as work-for-hire rather than under a "normal" developer/publisher relationship. If anyone knows more, please let me know.