I got full-on git-annex assistant syncing going over XMPP today!
How well does it work? Well, I'm at the cabin behind a dialup modem. I have
two repos that can only communicate over XMPP. One uses my own XMPP server,
and the other uses a Google Talk account. I make a file in one repo, and
switch windows to the other, and type ls, and the file (not its content
tho..) has often already shown up. So, it's about as fast as syncing over
ssh, although YMMV.
Refactored the git push over XMPP code rather severely. It's quite a lot cleaner now.
Set XMPP presence priority to a negative value, which will hopefully prevent git-annex clients that share a XMPP account with other clients from intercepting chat messages. Had to change my XMPP protocol some to deal with this.
Some webapp UI work. When showing the buddy list, indicate which buddies are already paired with.
After XMPP pairing, it now encourages setting up a shared cloud repository.
I still need to do more with the UI after XMPP pairing, to help the paired users configure a shared cloud transfer remote. Perhaps the thing to do is for the ConfigMonitor to notice when a git push adds a new remote, and pop up an alert suggesting the user enable it. Then one user can create the repository, and the other one enable it.