I had a question about MozyPro today so gave tech support a ring. Brian answered my initial questions quickly and easily. I also inquired into when or if they were going to develop a way to pre-populate media locally which would then be mailed to them before the initial online sync ... which can take weeks depending on how much data you want to backup.
He said that is huge in their development pipeline right now ... but couldn't give an ETA.
If Mozy can pull this off at a great pricepoint, they will have IMHO (at least for now) the killer online backup solution. Load up my backup data onto disk locally, ship the disk back to Mozy, forget the really long initial upload and begin sync'ing block changes right away ... all for $.45/GB per month!
It's still not a replacement (yet) for D2D nor tape for long term archival, but this is a great offsite DR solution.