ps. Gary said with the recipe posted it sounds like they are going for a sweet bread with the brown sugar. So a pumpkin, October fest, etc...basically a "sweet" beer would give it the best potential. But anything would work, you may not get the taste results your looking for.
I'll post my pumpkin bread receipe here in a bit. Your basically subbing the beer for some of the wet ingredients (water) You could do the same with apple bear and an apple bread.
I asked Gary (who most of you don't know actually has been in the mico beer business for 20+ years ) about Chocolate beer. He said you would have to be careful about what you choose. Most chocolate beers are actually very dry and have an almost bitter coco taste. There are a few that are a sweeter beer and taste like chocolate milk. Those would be good, the dryer ones probably not as good.
Any other questions let me know and i'll pass them along