The only thing that bothers me about things like this is you will probably wear out the keys it uses as I don't know you, but I hit joypad buttons far harder than I would my N900 keyboard.
I really wish there was a bigger market for dockable joypads as that for me would be better, as it it could contain a proper pad design and make holding the N900 for gaming more comfortable. Although I have to admit, the Gripper is more pocketable.
is anyone picking up the development of this? this emulator really needs a good front end and configurable input. mouse input also needs tweaking.
E-UAE looks promising too but development has since stopped and while there is a nice front end, etc, and mouse works better too, i can't seem to get it running in full screen. and keyboard input doesn't work very well.