The developer for the Hudson extension for Google Chrome, Sebastian Sanitz, emailed the users@
list today to inform the community of an update to his fantastic extension.
Sebastian's extension monitors ci.hudson-labs.org by default, but the URL and polling interval are both trivial to change. When any of the builds in the configured URL fail, you'll see a red "Fail" indicator, otherwise green "Ok".
If you're interested in contributing to the plugin, good news! It's open source! You can find it on GitHub.