Non-reved on Airtran the other day. Mostly slept, but an announcement got my attention. "Beer and wine are available for 5$, payable by credit card only". I'm not sure if it was the mention of beer that caught my ear, or the words "payable by credit card". Why does't AA do this? I can see where it would be really valuable capturing additional revenue in flight. Just think, mid flight up grades to get away from that screaming baby. Or, middle seat in the last row guy... Sir/Ma'am, we have a first class seat available for just 50$...