I can't imagine going back to life without my bestest friend: Now, where do I start finding stuff for my work? Its incredible... and is probably the biggest productivity tool eva.
But today, my bestest friend released SketchUp. A spiffy (only 19mb) cool 3D modelling tool... that integrates with Google Earth. Pfft! There goes my TODO list for the day.
And ya, and the best thing is... SketchUp is script-able with Ruby.