This is a great site. I formed a group on here myself a few years back, and played with a group of Aussie MSers but I had to give it away.

Just thought I'd let you know that you should be able to join up without an invitation.... or you used to be able to.... by clicking "Create a Free Trivia Account (instantly)" which you'll find towards the top of the page, in the first dark red section (under the blue).

http://www.funtrivia.com/private/main.cfm?tid=88457