4chan's text boards are a hive of activity - i started on /prog/ which I seem to remember I randomly came across after googling for something about the end of the crapflood and the 1st spoke claim went with this. A trolltalker (teh crapflooder??) had posted there I think, but I can't remember exactly.
But anyway I'm a programmer so like /prog/, but it's got a bit crap recently.. so /lounge/ is the general mindless posting hang-out... then there's /vip/ as well which is the same but different. Then the others are mostly pretty faggy and low-volume.