Nokia Confirms Lumia 900 Software Glitch, Offers Fix and $100 Credit - Ina Fried - Mobile - AllThingsD

That makes the price -$50, for people who bought/buy via Amazon

"“We’re already manufacturing devices with the new software,” Weber said. “Those are being shipped to AT&T stores.”
The company is offering a $100 credit to all customers, regardless of whether they are encountering the problem. The $100 credit is also being offered to any customer who purchases a Lumia 900 before midnight PT April 21, effectively making the device free.
“The customer always comes first, and I think we’re showing it here,” Weber said in an interview."

Nokia Confirms Lumia 900 Software Glitch, Offers Fix and $100 Credit - Ina Fried - Mobile - AllThingsD