I've been hit by a lot of requests by WordPress.com bloggers to add Woopra to WordPress.com blogs. They need to be directed here or to WordPress Ideas. Woopra was debuted at WordCamp Dallas and is a live blog traffic and statistics computer program with a ton of neat features for tracking "live" exactly what is happening on your blog right now. I've just been told that over 5,000 WordPress.com bloggers have signed up for an invitation but they can't receive one because WordPress.com won't allow Javascripts on the free blogs.
Like all things we may want, if there is enough interest, Automattic may consider adding it. So if you would like to have Woopra, let them know. I've added an Idea on adding Woopra to WordPress.com if you would like to have your voice heard, or you can comment here.