Let Credit Card Customers Pay From Your iPhone

Square, one of a couple of new on-the-go credit payment services, lets small businesses that are not always in a fixed location accept and process credit card payments over a 3G network. Is it the end of cash?

"With Square and Mophie Marketplace about to join the already launched PAYware Mobile, business owners will soon have an array of mobile credit card processing options to consider.

The concept of Square is simple: stick a card-reader dongle into the audio input jack of your iPhone or iPod Touch and start swiping credit cards. For small businesses, particularly retailers that aren't always in a fixed location with access to a phone line for a card processing terminal, Square could be a godsend. Some industry watchers have gone so far as to predict that Square portends the end of cash."