Musha I remember you and your Xzibit name. Good to see you.
Ive also been around since gamespy forumplanet. Joined there in 2002 and promptly after the new SD opened in May 2003. I was there, as is visible in my join date. Im very proud of the fact ive been around since then, even if ive had a couple off again on again years.
Other still active May 2003 people I know of are Master Kyodai, OL, Silent Killer, St. Elmo's fire, Sonikku, Miles Prower, Vyse and actually AnimeGamer who actually beats all the May's with a April 30th 2003. One day before my May 1st.
I assume all those listed definitely came from Forum Planet. Others im sure did too but they dont get the e-peen May status.