Al I can go on for days about proxy servers. I will sum it up in two points, but their are also more uses for them.
Basically proxies are a "go between" for any type of traffic you specify, but most commonly for http web traffic. Most people use one as a "caching" proxy in order to have images and web content cached closer to the source of the website requester. This reduces redownloading of the same images if someone on your network revists a website(s) frequently.
The second use for a proxy is to conceal your identity. It really isn't "too" effective unless you have access to multiple dns servers as well. But I won't get into that. Typically without multiple nameservers a proxy can and should conceal your web surfing identification fairly well. I use a proxy almost all the time from various ips to not only cache content, but block some ad servers if I want and to conceal my ip.
If you need access to a proxy I offer proxy access for fee. Of course their is a disclaimer that you not be conducting any web surfing that would be illegal in the united states. Going to a gaming site via proxy is not illegal so we offer that service. Rates are based on usage of course.
Let me know if oyu are interested, you have my msn and you can get my email from a mod as well.