Perhaps maybe they will fix the design of the square card reader? I saw the iPad + Square combo being used as a replacement for a register at a coffee shop and the lady had to fumble with it and eventually use her other hand to hold the reader so she could slide the card.
There's a lunch truck at my school that has the same problem. The problem is that the scanner plugs into the headphone jack and sits on top of the iOS device. It seems like it would be more logical to use a longer wire to get the reader off of the device and onto a nearby surface. This would also allow a more "normal" scanner size (instead of the dinky half inch one).
