Can you really change your metabolism?
Revving up the rate your body burns calories key to weight-loss success
http://www.msnbc.msn.com/id/14802091/

Nice chatty article about metabolism and weight-loss. Nothing new but a good overview of the basics. If you exercise more, your metabolism speeds up and burns more calories. Not rocket science.

There is a link to a great Metabolic Rate calculator
http://www.msnbc.msn.com/id/15321646

I think the resulting calorie requirement is high, but it is a nice interactive, visual calculator.