Bessides what Sarge said, there are these differences:
Members can see some threads that non-members can't, such as those in the "That's Life" forum.
Non-members get to view some ads that we don't that help pay for some of the operating costs of the site.
Members can post, whereas non-members cannot.
There may be more diffrences, but those are the ones I'm award of.
Bill (Da Nag) would be the authority on this!
Joe.