JOHN?? Do you not know or do you just want me to state it?
Anyway, a proxy website is useful to get past school filters which block websites. They block websites which kids go to A LOT! Like MySpace and FreeTranslations.com. It's the same for office filters.
Also, when you go to:
http://www.website.com
using our proxy server, in the URL bar it won't appear as:
http://www.sixty6proxy.com/website.com
It would be:
http://www.sixty6proxy.com/_____________________
Another advantage is that if the school or office kept track of the URL's, it won't show the websites you visited.
It also gets past banned IP's since it uses the server's Proxy IP Address.
If anyone can name more, go ahead!