When is a credit card like a switchblade? Take a look at the new Discover 2GO card. The patent-pending design is making its first appearance on customer keychains this month, and is sure to raise the eyebrows of the person next in line, if not the cashier. The kidney-shaped card swings out from a protective cover and is designed for those folks who would like to leave the house with just their keys and a credit card. The obvious problem, however, is that common happening: the misplacing of keys. Most people lose their keys more often then their wallet. But this card is another front-runner, like American Express’ see-through card, in the trend of attracting credit card users with a style statement. Hmmm, does anyone make a credit card that you can personalize with your own artwork or photos? That would be a real winner! Maybe I should patent that idea. (Update: U.S. Patent 5,746,451 covers a “Customizable credit card overlay”)