I've been doing beer bread for a few months now. Darker and malty is the best kind to use. I had been using my Guiness clone, but now I am using Rickard's Dark.
Its really good in German Dark Rye bread, which usualy calls for coffee, but we use beer instead. I have also made an ultra think version (20% more flour) for homemade croutons, and those were even better.
Mmmm, thinking about firing up the bread machine now...
