not cheap but one of the local stores carries
I don't have one but one of the supposed features is that when your cards are only partially out they cannot be read - opposed to the all or nothing of the one in the podcast. From the comments in the podcast I assume that the RFID chips on every financial card known has not made its way to the states yet.
The wine app looks more useful than the one i have been using but Vivino rather than doing a bar code scan does a image comparison to their database after you take a picture of the label. ( the one bar code scanner based wine app i tried before failed on a number of wines)