If you're using a browser which supports desktop notifications (Chrome/Chromium and possibly some other webkit based browsers at the moment) you can get a notification when your build has finished directly to your screen:
No more staring at the progress bars, go play some tetris or visit youtube instead! :)
To enable the notifications click the "Enable desktop notifications for finished builds" link which appears on your build list in supported browsers.
Once done your browser will ask if you want to allow susestudio.com to show notifications to you.
Just confirm and you're done.