One where people are accountable to each other and you put up a list of what you ate that day?

Have you looked at various forums via Live Journal, Yahoo! Groups etc for a weight loss support forum?
I know Weight Watchers and The Biggest Loser also has weight loss support programs where you pay by the month.
Good luck!

the best is the calorie shifting method which i tried and work for me and many people i have recommended to.
check it at http://www.fatlossfast.org
you lose 9lbs every 11 day.
all the best,
jo

Sparkpeople is good for that (I believe its spark people)
I really liked Calorie king ( i lost 4 pounds in a week) but its a solo thing. Theres another one, I think its fitday.com....Im not sure, ill check and come back