Somewhere around 2000 I was really into Tekken, Soul Calibur, and Ridge Racer. At the time my buddy, with whom I would spend hours playing Tekken Tag, wanted me to get on IRC so we could chat while I was at work. Well my online persona was "gamehulk" back then, an 8-character compound word that I thought sounded cool back in 1996 to use as my email, but seemed way too lame to use on hardcore IRC channels. Since I was so into those Namco games Tekken, Soul Calibur, and Ridge Racer, and I absolutely LOVED Namco's early arcade classics and was reliving the experience in this new application called MAME, I decided to call myself Namco.
As for the avatar, it's part of an image from Starcraft 2. I clipped it from the Blizzcon 2009 promotional website. I change avatars every so often. I may change it back to the "Made By Namco" avatar I had before, the secret easter egg in Pac-Man.