If they're offering bargains from multiple locations to Denver, AA is probably trying to hit United while they're hurting. Not a bad strategy, perhaps, but I can't imagine AA holding on to much DEN market share once the UA thing blows over. I think they'd have a much better chance of doing some damage if the bargains were on routes where the two go head to head, like BOS-SFO or JFK-ORD.

Meanwhile, I have a client that has to arrange a meeting in either Colorado or Silicon Valley. This may tip the balance! (I'd rather have it in California 'cuz that's more miles for me, but for a $178 fare ...)