Thanks for the tip, LovelyIvy! I've been using the boards at Weight Watchers (you don't have to pay to use them) but my big problem is that most of the people there are focused on being skinny, whereas my goal is to get
fit. I've been looking for some fitness communities but haven't really found one I liked. I'll give the About.com ones a try.
ETA - is it just exercise.about.com, or are there specific ones you like to read?