How to fix the Google Chrome “update server not available (error: 11)” problem.
sudo rm -r /Library/Google
sudo rm -r ~/Library/Google
I suppose it’s a versioning problem, there are still old config (plist) files present on the system. By removing these, and others, Chrome can reconnect to the proper server again.
Note: I’m just using the Chrome product of Google, so you could remove more configs than required for Chrome.
Update (13 oct 2011): So like Kris states (comment) there is an even better solution. Unfortunately for me the proposed fix never worked, the required scripts to run were not on my system.

July 24th, 2011 at 20:40
Worked like a charm, Thanks!
October 6th, 2011 at 17:55
Doing this can break the auto-update for all Google products installed on your system. In addition it doesn’t properly remove the updater from launchd. Please use the instructions here: http://www.google.com/support/chrome/bin/answer.py?hl=en&answer=1367288