... we would be the 218th largest brewery in the country (as of 2006, I can't seem to find a more recent version of this list). According to the "How many gallons of homebrew have been made" thread 10,600.50 gallons of beer have been made so far this year (as of this post).
10,600.50 gallons = ~342 bbl in 147 days
that comes out to ~2.3 bbl a day, or 849 bbl a year
and that's just from the people who participate in the how much have you brewed this year threads.
Impressive, I should add my numbers to the thread, not like I've done much, but every little bit helps!
I bet you could take that thread and multiply it by at least 10 to get the real amount.