That seems too late for both of those, heh. :) I started on LJ in 2001 and quit in 2006. Orkut I think I signed up for in 2004, and only lasted maybe a year there. I seem to remember the Brazilian influence even as early as that.
The Orkut timeline I might be misremembering but I'm fairly sure I was already at the university back then which would put it 2006 at the earliest.