An extra layer of security for people who want to stay in complete control of their data

Here is a quote I got from a customer that is really typical of what I've heard a lot of customers tell me:

"I’m looking to back up our Basecamp data because, even though I think 37signals and Amazon/S3 are two extremely solid companies, I still need to protect our critical business data that exists solely on Basecamp.  I need redundant copies duplicated to our local servers somehow.  The other angle is Basecamp project archiving – it’s a real pain to pull a large project OFF of Basecamp (to clear room for new ones) since they don’t (yet) offer any sort of mass Files export.  We mostly use the Files tab, in fact.  Having everything automatically pushed to our Dropbox account is a huge help."

Our customers are telling us that they fully trust Basecamp, 37Signals, and Amazon S3, they are not backing up their data because they are afraid of them screwing up. Instead this is an extra layer of security for people who want to stay in complete control of their data.