I'd never describe my 8 year old as a preteen -- maybe a "tween" except I don't use that word in conversation. I'd be more likely to describe him as "elementary school aged" or 8.
However, I do come here and read, usually in lurk mode, because I feel like he's got more in common with a 10 or 11 year old (who I do consider preteen) than with the 4 or 5 year olds who are frequently discussed on the Childhood board. Also, because I don't really need advice on how to raise a 4 or 5 year old (since DS is my only child) but will probably be able to use anything I learn here about older kids at some point down the road.