If you’d like to get Google Voice notifications in the panels Messaging Menu of Ubuntu 11.10, just enter the commands below (one line at a time) into the Terminal, once it’s done adding the repository, updating, and installing, you can click the Google Voice entry in the Messaging Menu and configure your account.

sudo add-apt-repository ppa:ken-vandine/notifiers
sudo apt-get update
sudo apt-get install gvoice-notifier

And there you have it!