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
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