HUB.IM

hub.im is an proxy server that can help you to access websites and connect your chat clients (msn/icq/skype/g-talk...) from behind a restrictive firewall, also works as a web-based anonymous proxy service which allows anyone to surf the web privately and securely.

Unlike other proxies, there is no software to install, you just need to configure your web browser or chat client to use proxy.hub.im and thats all.