I use them all the time as a resource although they’re not
designed to answer specific questions as such. http://www.experts-exhange.com is however. You can post technical questions and get an answer within a day or so.
There are however some good news groups aimed specifically at games development.
I frequently use
comp.games.development.audio
comp.games.development.art
comp.games.development.design
comp.games.development.industry
comp.games.development.programming.misc
comp.games.development.programming.algorithms
However, flame wars are known to appear but just ignore them.
They are a very good resource for development.