@Jeremy:

Thanks; I appreciate that!

Out of curiosity: what will the annual rate for the 20GB plan be? I'm guessing $100/yr, since the base plan is $50/yr ($25/yr beta)?

One final nitpick: Can you please put the admin menu entry somewhere appropriate, such as under "Tools?" There is no reason for BackupPress to have its own top-level menu entry.

somewhat-thread-hijacking-rant
I realize that BackWPUp does it, JetPack does it, W3 Total Cache does it, Contact Form 7 does it, Sociable does it, NextGen Gallery does it... but not a single one of these Plugins needs a top-level menu entry. I use every one of these Plugins, and my top-level menu is a mess. At least with Mark Jaquith's Menu Humility Plugin I can force all of these extra top-level menu items to the bottom.
/somewhat-thread-hijacking-rant