GNAA was the one it was using yesterday. If you do the Google search, you'll notice that the description on the search is pretty close to the verbiage this scumbag uses in his posts.
Interesting. I did a google search for GNAA and found the site you mentioned. I didn't want to actually visit the site, but from the description it seemed that it could be our troll.
I then visited www.archive.org and did a search for gnaa.us.
I visited the earliest archive, dated February 2004, which led me to a Wil Wheaton fan site, with a link to Fairness and Accuracy in Reporting.