From another beta tester!
YES! Resounding yes that it works with Android. I tested it with my Nexus 7 and the MD.emu emulator ... it instantly detects all four of the USB devices, numbers them 1-4 in fact (which is smarter than Windows since it doesn't), and instantly began to use the NES pad I had plugged in to navigate menus, no configuration required.
Now I expect most emulators will need some sort of configuration, but know that this is a completely Android-friendly device!