I currently have a 770 and an Archos PMA400 (QPE-based pocket PVR and PDA with a 30Gb hard drive), and I find that combination very frustrating, because each of them independently is almost the device I want; I wish I could combine them and have a hard-drive-based device with the 770's gorgeous large screen, and the PMA400's connectivity (USB host and device, simultaneously, plus WiFi) plus the 770's connectivity (WiFi and Bluetooth, so I have net whenever I'm in cell coverage and can use Bluetooth keyboards). Maybe this device accomplishes that.

(Personally, I hope the N900 has a hard drive and a faster processor. I can live without powered USB host if I have Bluetooth; I can't really live without Bluetooth.)