As Dan noted over in the Corner, Air America is done. And as he posted, they’re blaming an inability to find new investors. Air America is/was owned by Mark Green and his brother Steven, founder of the publicly traded SL Green Realty Corp.

Check out the chart for SL Green Realty. The Green brothers bought Air America in January 2007, at just about the stock’s all-time high. It’s worth about half that today, which is probably why the very wealthy Green brothers were looking for new money to keep the operation going.