web-based proxy server???

Hi there,
I’m wondering if there’s a facility for a web-based proxy server for small business users. I’ve afew clients with only a couple of PC’s who want to be able to manage web pages being accessed. I know we can do it through IE, but what I was thinking was that if I can route their web traffic through a web based proxy server I can manage it much more simply remotely, and bundle it with other web-based services.

Anyone know if this is possible? I know there are web-based services to help make your web-browsing anonymous,so if they can work that way I’m sure they could work my way too?

I’d appreciate any thoughts/feedback