I'm sure some may reccomend the Hobby Heaven Message Board (www.modelcarkits.com), but I dont know if I'd call it "serious". Its more like a bunch of whining babies, and little real talk about serioise building. The chances of a talented 1:1 builder from the HAMB finding any info on model building there, that they couldnt just figure out themselves is probably slim. If you really want to read info on the master, I would highly reccomend both of Gerald Wingroves books.
You could start surfing from here: http://www.roadsters.com/kits/ Dave Mann (602) 233-8400 weekdays http://www.roadsters.com/
i went to some and found the scaleautomag board has a shitload of good info at the bottom in the Interior, Exterior or Engine bay forums.. just got tons of ideas.