ifoAppleStore's Gary Allen has posted a first look of Apple's soon to be implemented iPod touch-based point-of-sale system on AppleInsider. According to the piece, the new units are called EasyPay touch and consist of an iPod touch, battery pack, barcode scanner, and a magnetic card reader. The unit itself runs POS software which has apparently been written by Apple. The outer shell which contains the additional POS hardware resembles an Incase Power Slider.
We have also independently heard from an Apple employee that the new units will be small enough to fit in an employee's pocket, making them easy enough to be carried at all times.