Comments about NextoDI Nexto DI NVS2500 Video Storage Pro Portable Backup Storage Device with 500 GB Capacity:

This is the best offloading workflow I've found!
It is light, autonomous and 100% failsafe!
I had a lot of problems with using my P2 on my mac, the adapters kept breaking, computer was crashing... So I decided to invest in this offloading drive. Since it came out the company kept updating the firmware (currently v. 1.2), turning this simple offloading drive into a real production tool with the recent web preview of your footage, and with the given failsafe workflow, there is no chance of loosing your footage, with the safe copy, the cluster check and the full automatic backup.
The only two cons are the price, still very high for a hard drive (1/2 the price of my camera) and the lack of Firewire800 to easily connect to a MacBook Pro