What about Passwords? Using Solution #2 all passwords of the communication platforms must stored in Ubuntu One, which is not in my favor. A multi-platform client like Empathy synchronised via Ubuntu One is a great idea but should not be done with lack of privacy
I was thinking more as something to have, for example,
if one goes to a lanhouse, or some friends computer. Supposing that empathy is installed there, it would be nice if one could log into the "empathy account" and have all accounts working. I don't see how ubuntu One can fit this, it is not about having empathy configured in my machines, but about having a portable IM configuration.
For example, for any single IM protocol, i. e. MSN, one can, in any machine, log in the account and use it. I was thinking about this facility for a protocol-wide client as empathy.