i told myself a long time ago, one of the best things i had done was learn both mainstream and the adult market, knowing each side has its advantages. i certainly would encourage anyone to learn this side of it, only to widen perspective.
i had heard some people asking about some of the Mainstream resources and thought i would point out some things about that side of it.
people are professional, you see them wear suits at the shows, there is also many more girls at the mainstream shows ;)
the billing environment is different, mostly merchant accounts and people using paypal
some of the big forums are sitepoint.com, forums.digitalpoint.com, warriorforum.com, abestweb.com and others
some good mainstream affiliate blogs and other resources
http://www.startupnation.com/
http://www.websitemagazine.com/content/
http://www.b2bm.biz/
http://www.shoemoney.com/
http://www.johnchow.com/
http://www.zacjohnson.com/
good luck