Not sure if anyone even checks this thread anymore based on wolfking's last post, but maybe it's worth a shot again.
I started browsing occasionally in '99 when I discovered DT, but don't think I posted, not even sure I signed up at that point. I had definitely signed up and was posting in January of 2002 in the lead-up to SDOIT.
It was still a periodic thing though at that time. It ebbed and flowed, and I don't think it was near-daily until sometime in '06. After the split here in '07 I was initially at both places, but my growing disillusionment with DT eventually led to me spending more time at the other forum and elsewhere. Actually, I think back in '04-'05 I was spending more time at the Rudess forum than here. I finally decided to come back here August last year or so.
So I guess January of '02 is my safest join date. Wow, that makes it over 20 years. Time flies.