GPUReview's got a couple of shots of a 1GB ATi FireStream that they spotted in retail. Check out the photos here.

"The card is indeed based on R580 with a board layout nearly identical to the FireGL 7350 including the 1GB of ram. The box I saw contained only this card and a driver cd which had been burnt and was labeled as being a beta. Also, I found the label on the CD interesting: 'FireSTREAM Enterprise Stream Processor.'"