Web content filtering

[Crypt]

First off sorry if this is in the wrong forum.

The company I work for is looking for something that will block certain websites such as facebook and myspace amongst various gaming sites. I have a FreeBSd system running dansguardian with an extensive blacklist set up. I haven't yet put it into production but am thinking about it.

I know there are guys out here that are IT people for companies and just curious as to what they have used, or might use with FreeBSD to block out certain sites and what comp specs it ran on as well as how many users it controled?