You might not be able to find much in the way of boxed PC games at your local GameStop store, but now you CAN use them to feed your PC gaming habit thanks to newly available Steam Wallet voucher cards. There's nothing available yet at GameStop.com, but tipster photos sent to both Kotaku and Polygon confirm that you'll be able to buy $20 and $50 cards.
A couple of photos don't exactly count as confirmation of course, but a subsequent update on Kotaku adds that some stores -- one in Batavia, NY is named -- are already selling the cards. It's worth mentioning that all of this falls in line with a recent rumor from a "GameStop source" speaking to Kotaku who said that Steam Wallet vouchers would go on sale in stores on May 15, 2012. Is it a coincidence that we're seeing these product photos starting on May 13? No, I don't think it is.