I'm using a 500 gig Time Capsule as a NAS, and it's doing relatively well. I have a mac mini as an HTPC which draws it's movies from the Time Capsule. My only complaint is that when my mac mini falls asleep and is woken up, I have to click my way through the finder to the drive on the Time Capsule. If I don't and have Front Row open, Front Row won't see the aliased folders that lead to the Time Capsule content. When I click through via the finder and then go back to Front Row, everything is fine. It's annoying because I'd like to not have a keyboard or mouse connected to the mini. Any advice?