An long-time friend of ours is a runner and he updates his runs and walks and other fitness activity on dailymile:
It’s like facebook for fitness activity, but it’s more focused and the names are limited to first names and last intitials. Mark and I signed up tonight. We like the format and it’s simple for us to log in our activities daily.
Try it! If you can get to it, here’s my page: http://www.dailymile.com/people/tcc2010#ref=activity_feed