We’ve been running a self-hosted WordPress blog for quite a while now on agileteams.com. This one is being created to investigate possible migration of our blog home to wordpress.com, to:
- make it easier for more collaborators to join in the discussions, and
- reduce WP admin work for the volunteer webmistress (me)
Looking forward to chatting with you all!
Agile Teams 
Discovering the very cool Disqus commenting plugin (which works on self-hosted WordPress sites, but not wordpress.com – yet) has muted my enthusiasm for migrating the site just now. Stay tuned.