The Android is getting some loving today, heres a quality Nes emulator for the system:

NES emulator for Android has been updated. Changes:
- Switched to DropBox APIv2. DropBox support works again.
- Use "Settings | General | Reset All Settings" to remove old DropBox token.
- Fixed a few bugs in the DropBox code.
News source: https://play.google.com

via http://forum.emu-russia.net/viewtopic.php?f=26&t=6960