Though the modules in PPC Classroom 2.0 are great for the newbie, I didn’t feel it was worth the $97/month. I wouldn’t be able to view the forum until after my free month. I retain access to the modules and unless the Inner Circle provides insights beyond my knowledge, I cannot see the worth of almost $100/month.
An excellent source of information on PPC Marketing – Adsense, specifically, is The Unofficial Adsense Blog.