The reason the Inner Circle gets my vote for weight loss support site is because of its founder Tom Venuto.
Tom is the author of the best selling e-book Burn The Fat Feed The Muscle. I have a copy, and take it from me - it's a great book! Burn The Fat will teach you nearly everything you need to know about fat loss.
Here's a great testimonial from one of Tom's customers:
"When I started the Burn The Fat program last August I was 280 lbs. My body fat% was over 39%. It is now April - 8 months later - and my weight is 195 lbs and my BF% is around 12%. WOO HOO! LOOK AT ME! With my Burn The Fat, Feed The Muscle "bible" and the priceless support and encouragement from everyone at the Inner Circle, I'm turning it up a notch or two and now working hard on achieving my goal of 6-8 BF%. To Tom and everyone involved with the Inner Cirle... I THANK YOU ALL - Michael, Inner Circle Member
FitDay.com is one of the most well known online weight loss support websites in the world.
It's usually referred to as a "diet software", but it offers way more than that.
FitDay.com currently has both a free and paid membership to choose from.
I like the resources within the website. I don't like the lack of direction when you first get started. Overall, FitDay.com is a great resource if you already know how to eat right and how to design a good workout program.