Google Maps has featured internal floor plans in its mobile app for a while, but now they're available on your desktop too.
In total there are over 10,000 floor plans available in Belgium, Canada, Denmark, France, Japan, Switzerland, Sweden, the UK and the US. There's a full listing of exactly which plans exist over at Google, and the number looks set to grow. You can help Australia get added to the list by uploading floor plans.
While internal floor plans are clearly more useful on your phone than a computer, it's a nice little addition. Or time waster, as I just found. [Google]