WassUp is a real-time visitors tracking for your Wordpress blog, it has a fancy admin control panel and many good features to watch your blog growing up.

It has a “current visitors online” view and a more detailed “visitors details” view where you can know almost everything your users are doing on your blog, it’s very useful for SEO or statistics maniacs. It comes with a “Spy” view in Ajax like the Digg Spy.