I work for a Children's Museum and we are planning a business model that would allow us to have mobile admission desks. With that, we have been looking into a number of POS (point of sales) systems that we could use at the front desk on an iPad. (no messy cables, all wireless) There are several systems out there for restaurants (re: poslavu and isispos) but none that we've found so far for attractions. Specifically, we would like to be able to track our members through a reservation system on the iPad. Are there any iPad apps such as this? Thanks so much!