One question, will it let you do Time Machine backups over Wi-Fi to the attached drives? At this point, I think we can only guess about how flexible it’s going to be. Keep in mind, Apple promised this 3 years ago in Leopard with AirPort Disk, and it NEVER HAPPENED. Then, they suddenly found out that you could add a hard drive to the Extreme, make the backup parts work and market it as a “new” product. Until a real home server for the Mac comes along, this is probably one of the best things you can use to solve that problem.