Another cool idea posted over on the Wired How-to Wiki - Grow Tomatoes Upside Down
This is a great idea if you're short on space.

Two things that are high on my List Of Awesome?  Pizza and my Weber Genesis barbecue (pictured at left because she's so photogenic).  Not things that I would normally think of going well together until I saw this Wired How-to Wiki on how to grill a pizza.  I'm going to have to try this.