This is always the biggest concern. The smaller firms use 3G based connections anyway as they're mostly on the road. The mid size guys have ADSL and 3G back up. The big guys use leased lines with SLAs.
We have 3 fully redundant data centres and a separate archival site. Its cheaper to pay us for the redundancy than fuck it up themselves. Their data is better in our hands as we centralise their DR strategy. Previously their stuff was stored in infected windows laptops with no backups and at best tapes being taken home by staff (unencrypted). They can access it all and export at will too.
(I once asked that question of a salesperson flogging eportfolios - student work for portfolio based qualifications stored entirely on their servers. There was no answer)
Source escrow - we release it to clients if we go bankrupt, all data is freely exportable and best of all we're rolling in cash so going bankrupt is going to require some seriously hard work.
We're trying not to be that bastard enterprise company if you know what I mean :)
How does the disaster recovery plan cover complete loss of Internet connection or corruption of remote data?
Genuinely interested.