Right now im using Meebo instead of Empathy or Pidgin or any other IM application, because i have a history i can access from everywhere and i dont lose it, when i install the latest ubuntu, or change my IM client.
I've been storing my Pidgin history on UbuntuOne pretty much since it launched, and it has been a disaster! Trying to sync between multiple machines, I have yet to have it sync once successfully. It just doesn't seem to be designed to handle thousands (12,000 so far) small files... It's frustrating, because every time I connect it wants to re-scan these files for changes, but they are historical--they should never change. All I care about is the addition of new files (or possibly deletion of old ones), but not modification. I would really like to see this feature implemented in a more usable way!