I had a lot of fun making a little real-time visitor counter using Motion JPEG a few years ago! I was quite proud of that :)<p>The demo is still live:<p><a href="http:&#x2F;&#x2F;drewgottlieb.net&#x2F;2012&#x2F;07&#x2F;29&#x2F;real-time-user-count.html" rel="nofollow">http:&#x2F;&#x2F;drewgottlieb.net&#x2F;2012&#x2F;07&#x2F;29&#x2F;real-time-user-count.html</a>