515 Gigs in a square inch?
Sounds good to me. Between this and the 32 Gig flash drives I read about recently the "click of death" is on its way out. Of course it will no doubt be replaced by something silent, but just as deadly.
All I know is that my inner geek says that this puts us a step closer to those cool cards they had in Star Trek (they had no moving parts so they weren't floppies and no holes for pins so they weren't like flash memory).