Fitness Goals Support Group
This community is dedicated to group support around achieving fitness goals, whatever they may be, through personal training, athletic activites, or other strenuous activity. Whether you are trying to get fit to treat a health problem, boost your mood, relieve stress, or tone your body, this group is a great place to meet other like-minded people who have similar goals.

There is a member group here called The Walking Group and there is a spreadsheet to log your miles whether you walk them or dance them. They also have a monthly match for a walking (dancing) buddy you might find useful.
Here is the link to the group
http://www.dailystrength.org/groups/thewalkinggroup
I used to be a part of a forum (on another site) that made "competition" groups. its like a support group that was very fun. I"ll try to remember the name of the site if you want.
I am afraid to join you, although I want to start walking/ moving again, I havent been succesful for almost a year now, afraid of trying again and not succeed...