I've just added a great little widget to The Computing Expert which tells me how many people are currently viewing my blog. Not only does it show up on your blog, but you can also download a plug in for Firefox which tells you how many people are on your blog in your status bar.
If you click the plug in or your new widget on your page, it will tell you what your most recent unique visitors have looked at and will also rank your pages as to which are most popular.
You can get yours now by going to whos.amung.us now.
