As of today the US Airways Dividend Miles card with a 50,000 mile bonus offer has been removed from the Barclays site. Thankfully, I still have a working link for you, though this final opportunity to get the card will likely be short lived.
The card offers 50,000 bonus miles after first purchase and paying the $89 annual fee. 50,000 miles for $89 is a pretty incredible and considering that these miles will become AAdvantage miles when the programs merge later this month, I would say this is the best deal floating around at the moment.
Apply now or kick yourself later when you are sitting in coach, instead of business class, all the way to Asia!