Nothing new...
http://examples.oreilly.com/9781565926004/Palm_OS_Emulator_Mac/Instructions/Guide.html#gremlins says it all. I've always wondered why this didn't catch on more widely - it was fun to see your app being destroyed in the PalmOS emulator.
Glad that Google is leading the fray - the code kiddies look at Google the same way the Israelites looked at Moses when returning from the mountain with the Tablets, so it'll get some traction now.