I first covered MintChip a week or so ago and as more news has come I wanted to add a couple of things.
First of all @BurnsMod received the above Mintchip Devkit and wrote a nice piece about what it includes. It appears the USB version is basically a USB adapter to the MicroSD chip.
David Nicol points out that MintChip uses CAD on my last post.
Jon Matonis writes an important piece on Forbes MintChip misses the point of digital currency
However, digital currency is not simply about taking official money and making it useful for online and offline environments in a digitized form. The point of digital currency, and especially free-market digital currency, is to broaden the avenues for issuance and adoption of alternative nonpolitical monetary units. Most electronic cash systems already expand and revolve around the State-issued currencies although …