Hello,
I've put up a forum at http://www.hamsterwheel.ca for the purpose of allowing people to post periodically about their meditation practice. I've found the forum useful thus far to keep up my own habit, and to see how others practice...
Currently there are only three users, but I'd like to get a group of 5-10 on there for mutual encouragement.
There are two forums, a 'discussion' forum where you can post whatever you want, and a 'check-in' forum where you can create your own thread about your practice. I'd like to keep the check-in threads free of other people's opinions on how one should practice, ("You're doing it wrong!" is a comment I'd like to avoid, people should be free to practice how they feel is appropriate.) so every thread in the 'check-in' forum should consist of a series of posts from the author of the original post.
You'll have to register. This is not in any way associated with Dhammawheel/Dharmawheel.
I acknowledge that people are likely rather reluctant to talk about their practice, as it's a rather personal thing and making it public leaves one vulnerable.. But you can post as much or as little information as you want. Also, admitting to missing days of practice isn't such an awful thing-- you'll see on the forum I have a lot of 'too drunk to meditate' days. Life happens. Hopefully everyone who posts on the forum will be supportive and understanding.

Since you aim for a small group, i feel like people at your forum would also profit from an "introductions" forum, perhaps with emphasis on past practice.

I have been posting on Hamsterwheel for a month now and have found it a very useful way of maintaining my practice. By making a public declaration of my intention to sit regularly every day, I find that I am more inclined to put this into action. Posting times and comments also serves as a meditation diary, allowing me to review past patterns in my meditation.