Revisions is a little Mac menu bar app that gives you a timeline of all editing activity in your Dropbox, lets you do diffs to see exactly what changed, and makes it easy to undo any edits (even edits involving multiple files). Useful to keep track of recent changes, and to restore if needed.
Here is a short demo video if you're curious:
I'd love to hear your comments and I'd be happy to answer any questions you might have!
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The UI on this tool is a bit geeky and it would be great to be able to "watch" multiple, specific folders simultaneously. But this is a great start and adds serious value to Dropbox.
Revisions 2.0