Comment 2 for bug 893738

coalwater: We use it to save the Lernid configuration (window sizes, irc login, etc., in the future the last classroom chosen). The idea has been that it would be saved to the cloud and you would use the same configuration automatically when you started Lernid from a different computer if you were signed into Ubuntu One in both places.

I don't know of any other cloud services that support couchdb.