Fud = shot for Fudzilla, surely you've heard of them!
Ahh yeah, I've heard of them. Sorry I wasn't being wide I was genuinely confused.
Anyway, of course there is a level to which DPI is usefull, the higher it goes the less handy and more of a hinderence it becomes. My G9 has the potential to use 3200DPI, but it's nearly always set to 2000.