If they are blocking out the whole site, then they are a bunch of idiots and morons, and you'll be better off working for someone else. I'll bet they blocked the whole site because it allows access to the alt.sex.* groups, and they are too stupid to know how to block that part of the site.

Of course if you do find a new usegroup archive, what is to stop them from blocking that as well?

Some Corps block Yahoo.com because it allows search access to adult sites. Also geocities.com, etc.