Unsurprisingly, given the small company and big ambitions behind the project, the Square mobile payments system got off to a shaky start earlier this year. Hardware shortages were resolved relatively quickly, but setting up the proper fraud prevention infrastructure without transactional limits -- which, shockingly, were disfavored by merchants -- threatened to shelve the little credit card reader for a long while. Not to worry, though, as today the Wall Street Journal has word that Square is look
