So have you heard of My Fitness Pal?
It's this awesome website where you can keep track of calories and exercise, with a social network vibe built in too. There are different groups and forums you can take part in, or not. You can update your status, weigh in, create goals...whatever you want to get out of it. There are AMAZING success stories with before and after pictures that will inspire you to work hard.
I highly recommend it. I've lost 3 pounds in 10 days just by keeping track of what I'm doing and being more aware of my choices. If you decide to join let me know!!