I've included more informal beer guides. Again, not all states have them, and some states are better organized than others. But these sites can be good references for opinions or news that you can't get on the guild sites.
- Brewers Association (National)
- Illinois Craft Brewers Guild
- Brewers of Indiana Guild (BIG)
- Michigan Brewers Guild
- (Ohio does not appear to have a brewer's guild)
BeerAdvocate's BeerFly and RateBeer are also indispensable resources for locating good regional beer.