I just launched a website in the classic theme Whats my IP , but this time with a twist. I'd really like to make it the best tool out there for this job, here's a synopsis of the features: Slick but FAST design, loads in milliseconds Proxy support: can tell you if you're using a proxy and if it is anonymous GEO Tracking: will tell you your country and your nearest city (60% accurate on the city, nearly 100 on the country) Tells you your color depth, anti-aliasing Tells you your screen resolution Tells you your support for JAVA, Javascript Tells if you support cookies with a single pageview using a slick AJAX call Tells you your TCP port, your HTTP Referer and your host, and of course the exact user agent string of your browser What could I add/modify to make it better?