We just dumped our T1 in favor of a 1.5/384 ADSL line since we are no longer hosting anything on-site. I'm not postive that 384Kb is too slow for 2GB/day, but it seems like it to me.

Actually, it would only be slow if you were sitting there watching it. We run our backup at 1AM currently. Maybe we would have to run it earlier to make sure it was done by the morning? In the end, this seems like it would be more expensive as long as the DLT tapes last as long as Tony says. I will look into this and other services more though. Thanks for the idea!