Does Ubuntu One look for sources of files it needs to download on the LAN before it goes off and grabs them from the cloud? I live in Australia, and we have download limits here, so I'm nervous that having Ubuntu One installed on a few computers could burn my available downloads pretty fast.
I know it is possible to get around this with rsync, but if I'm doing that, I don't really need Ubuntu One, and it is likely that Ubuntu One will realise there have been changes much faster than my cron jobs will.