Ha, no not the first besides t1. One of the few that are still active, but not first.
A lot of people joined when I did (I think that's the first day it was available for everyone), like PopTart0219, Fishyguitars, and a bunch of others. Not that many still use the forum, though.
It'd be better to ask someone who beta tested the forum, like Madi, but from my experience, the forum was way quieter. More related to code, less flame wars... but hey, we have a larger community now, that's ought to be expected.