Bitmit.net is one of many bitcoin marketplaces cropping up where you can buy and sell goods for bitcoins. There's not a lot of inventory yet, but it's pretty neat to look around to see what you can get and how much it costs.
Bitcoin.org is the place to start to learn about bitcoins, bitcoin mining (where bitcoins come from), and get all the software and resources you need to get started. Bitcoins could be the future currency of the world. Don't miss the boat!