Washbangers does, but they only fill their own growlers so you'd have to buy one from them. They are the only ones in College Station too.
I'm interested in that too. Never heard a "good" reason for those that do that " fill only house branded" growlers thing.
Just FYI if you go on Fridays you get like $5 off fills with a food purchase. But yeah its the only place for now
Saw you tried to BM me a couple times. Check my profile for my email address as my inbox is perpetually full. PS, I am in Austin next weekend...