Well, they're still around for now ... and now Stockback is offering $2 back on all US Airways tickets purchased, except for full fare tickets! That's right, this must be the one case where buying full fare is detrimental!

They are also offering $5 to/from LGA still and $10 to/from some cities in the West (PHX and LAX for instance). For complete details/restictions, click here: http://www.usairways.com/promotions/...ck_welcome.htm .