Ok I found this out by googling Ajax which I found that under Wired under and RSS Feed. Ajax I guess is a web programming component that is supported by many browsers. It uses XML, XHTML, and CSS I think I read. Now here's the thing. EyeOS is an Internet Browser OS - say again? - you use an Internet Browser to setup the OS and then you just run the OS in the web browser. I'm going to look at the Code here in a minute and see what they did. Google EyeOS if you want to download it and try it. If you guys want I can setup a server so that you can test it out for real online. Otherwise I'll put a tutorial on here for how to set all of it up. Now the next one I found (I found all the info on this stuff on the Wikipedia. I'll link it here in a sec) is FlyakiteOSX. It changes your whole XP environment to mimic Mac OS X. Google it. It looks awesome, but still no where close near XP. Now here's the link I told you guys about: http://en.wikipedia.org/wiki/AJAX or a list of Apps that use Ajax: http://en.wikipedia.org/wiki/List_of_websites_using_Ajax etc. etc. Just search through there.