-physical controls only (that's why I post here, you can configure them btw)
-no save states (the original project does not implement them, and I'm no good at understand basics of the 68000 emulation)
-should be ok starting from Android 1.5 but I didn't test it (Dream on Cyanogen here).
You need to own a rom copy and some disks to use this legally, of course. If there's some good feedbacks, maybe I'll put it in the market (already done a couple of emulators there). Enjoy !
Edit 12/27 : Now with sound and touch controls on the Android Market