i would really like for there to be an insane amount of characters to master
most people playing this game are going to be familiar with the series and I've liked learning new characters every game it's a lot of fun
if it's a bluetooth keyboard there's no need to hack it, no?
you just have to pair it with whatever device you want to use it with
EDIT: in fact some japanese guy has hooked it up to his ps3 already: http://emuonpsp.info/?p=227