Is it possible to connect a single Dropbox Mac app with two or more Dropbox accounts?
Solution 1:
You can't do it out of one copy of the app, but it seems that you can duplicate the app. You can see (somewhat complicated) instructions here:
http://maketecheasier.com/run-multiple-dropbox-accounts-in-mac-and-linux/2010/05/24
I haven't done this personally, but this looks like it should work.