Thanks for responding. I am just spitting out questions and hypotheticals that jump to mind when a see a service like this offered.

How do you guys limit by file type? I imagine that is is something more advanced than simply looking at the the file extension. But if there is any advanced analysis, how does encryption come into play? Lifehacker suggests users should encrypt their sensitive data before uploading, but will you accept encrypted files? Seems like it would be difficult to impossible to tell the difference between encrypted home video and encrypted database backup.