Well, I have a dilemma. I want a small and light 2.5"-sized external HDD for my time machine backups and external data. Problem is, on the MBA at least, there are no thunderbolt devices yet, and the one from Lacie seems to need its own power source, and it looks like it was from 20 years ago! I got a 500 GB, USB 3.0-2.0 GoFlex 2.5" HDD from Seagate, its nice and light, but its 5400 RPM, and my MBA only supports USB 2.0, so it took a long time to do my 50GB backup. We are talking more than 1 hour. I wish there are thunderbolt to USB 3.0 converters. Sooo, all that said, what is the currently best solution for an external storage solution that would be fast and light?