I just went through my email to find mine: 28 October 2004, so 2 and a half years or so.
Aah, memories. ^.^ Crazy how time goes huh..
I have a faint memory of the time in 2000 or 2001 when I posted to *really* old Mimitchi.com forum which didn't need registeration. I had Furbies in that time and I posted to Furby section.
I am not sure when the first Mimitchi.com board was created, but I think this is actually 3rd one through the years.