Group Trackr is a pretty handy site for tracking the status of flickr groups. Once you add a group, it will log user and photo data for that group making it easier to see how your groups are growing. Once you start tracking a group, Group Trackr will provide you with a rss feed so you can monitor new posts and users in the group. Groups are an excellent way to share pictures with people and Group Trackr can help you keep tabs on all of your favorite groups. Check it out!