Bushfiva, you've just given me a use for a 150Gb USB drive I have lying around!
We do have our mp3 music files on the terastation for everyone to see, and although they are replicated on my laptop, I had been concerned that if the station failed, recently ripped CDs which I hadn't picked up might be lost and have to be re-ripped.
If I back up the non-backup files to a USB drive, I have an extra level of support, I also like the UPS idea - I hadn't realised that the terastation could take that long to sort its act out, but 750GB of RAID would, I suppose, take a while! Next cheap UPS on ebay has my name on it...
BW