Unfortunately, I don't have my Mac here with me, otherwise I'd try it. Never heard of Pippin until today. I didn't know it was that close to a mac. Pearpc? Looks awesome, I should try that and emulate MacOS 9 so I can play Odell Down Under again (not the Win16 version, the Mac port was much better).
Sorry for the bump, but the files listed in this thread lead to nowhere. Here is an actual link to a Pippin SDK- http://macintoshgarden.org/apps/apple-pippin-sdk#comment-4485 And of course, that link will be non-working sometime in the future.