try sticking loads of short (multitap?) delay on percussion sounds.
ohmboyz vst is good for this cos you can mangle stuff even more by linking the parameters to lfos...

slightly offtopic - anyone know of a (pref. free) vst that works like the granulizer in fruity? i've tried a few things out but haven't been able to find anything that's quite as flexible as the fruity one....