Just seen this and thought it might be a possible archival solution, particularly when the higher capacities come on stream.
http://www.tandberg.com.sg/td_product_view.asp?pro_sid=20061002110957281130

Looks like it'd be really slow. The transfer rate is 25 to 30 megabits per second, so four hours to archive 1 hour of 1080p footage? Look instead to LTO3, which has a much higher capacity and its transfer rate is 640 megabits per second.