iPod House News- Twitter co-founder Jack Dorsey is on a mission to kill cash. He likes money, just not actual cash transactions. Dorsey's new venture, Square, could help businesses--large and small--, and even consumers eliminate the need to carry cash. Square allows credit card payments to be processed directly from an iPhone or iPod Touch. That part alone isn't all that revolutionary. There are a number of iPhone apps that facilitate credit card payments, but they require manual input of the credit card number. What sets Square apart from those apps is that is provides users with a small--well....square--gadget that can read the magnetic stripe information from credit cards.