i always heard about beer being good for milk, but my mom told me that it was more about relaxing than the actual properties of the beer. i have to say this has been my experience. when tziporah was in the NICU, i was having a terrible time getting my supply to keep up with her (this was day 9 or so... my milk had been in for a few days already)... that night my husband and i went to a really good restaurant for dinner instead of the tinned soup and toast we'd been living on so far. i had my first beer in months, got a little teary-eyed/giggly about how crazy it was that we were eating a nice dinner in a restaurant 9 days PP, and when i got back to the hospital, i promptly pumped my first 5 oz bottle ever. now i have a beer with dinner fairly frequently, and i always get a let down just as i'm starting to feel nice and relaxed from the beer.
ps i drink mostly dark and amber types, plus some guiness here and there.