Yep, I've been checking weekly for a flight leaving the morning of 10/28. $122 isn't too bad one-way for US Air, and I prefer having an assigned seat via US then going with SW. BUT, it's still a little ways off before SW posts flights for late-Oct.
I've been watching the available seats, and if the US flight starts to fill, then I'll grab my tickets. I have a feeling when SW posts the Oct flights, US air may drop to $99 or less, so I still want to play the waiting game as long as seats are available.
Another reason the US issues looks like a glitch ... EVERY SINGLE flight is listing the same 529 price, where usually you'll get a variety of prices depending on the departure/arrival time.