This seems to be the next thing. Western Digital has a 200 GB ATA drive out now, and the only thing is that OS X.1 can't support them, but Jaguar can. So I'm thinking on the next revision of the Xserve, we will see the option of up to 800 GB of storage on 1U, it makes sense in my eyes. That'd be killer, so close to one Terabyte in 1U, the competition wouldn't be able to compare.