Great work, looking forward to giving this a try on my 3.0.1 multisite. Database backups are great but people will want their content protected as well.
Which brings me to the feature suggestion - something I have been keeping in the back of my mind for a while.
It would be great if individual blogs had the option to download a .zip of their /files/ folder.
Ideally the Super Admin should have an option to allow this ability or not. Even better would be if we could also allow/disallow this to each blog. The ultimate would be an actin hook where we could tie in payment plugins, allowing this as a 'Pro' ability.
But one thing at a time. :)
And if I find anyway to build off of this with a quick admin page for blogs, allowing them to do this I will pass it on.