This plugin shows you real time statistics about your blog. It collects information about visitors, spiders, search keywords, feeds, browsers, OS etc.
Upload "statpress-reloaded" directory in wp-content/plugins/ . Then just activate it on your plugin management page. That's it, you're done! (Note: If you have been using the old StatPress before, deactivate it. Your data is taken over!)
Update from within WordPress Admin Panel does work, too. But don't forget to run "StatPressUpdate" afterwards!