First off, I would like to say that I am new to WP7 coming from webOS and I love WP7 so far. I miss multitasking a lot but I love how smooth the UI is.
Anyway, I just picked up the Square credit card reader today for my ipod touch but I really would rather use it with my phone. Does anyone else have the Square? And is there anyway that we could pressure them to make an app for wp7??
It should be possible for another developer to write an app that reads the Square reader data. The reader is just converting the data on the strip to audio and passing it to the mic-in port, which is then read by the application.
Intuit GoPayments could do this (not likely to). There is also Dwolla on Windows Phone (though they don't do credit cards, I don't think.)
Hopefully someone will step up to the plate for us!!