Here in Utah there is a local podcast production that does casts that debunk a lot of what the "experts" say. Sure the "experts" that are debunking it may be a litle biased, but I think you can learn great things as well.
Last week a local builder and friend of mine, Danny Small with Integrated Energy Systems, did a podcast on insulation and he debunks the myth of thickness being better. It is about 30 minutes long, but it is absolutely worth a listen. So CLICK HERE and listen. You won't be disapointed and you won't feel that you wasted 30 minutes of life for listening to it.
If you would like to contact Danny Small you can reach him at dsmall @ build-ies.com