I issued at the terminal
sudo lsof -i
And one of the process listed was ubuntu-ge which was in CLOSE_WAIT state to canonical.com. My guess is that it's the updater process.
By the way, I'm on a Ubuntu x64 12.04.
It allows 32-bit systems to use up to 64GB of RAM. Normally, they would only be able to use up to 4GB.
This is probably
and ensure that