The Times Dealbook blog notes today that shares of the entity that announced plans to buy Jamba Juice, the Inc. 500 smoothie chain, have risen dramatically. The Dealbook also says that there has been a little boomlet of deals involving blank-check companies. These are corporate shells that raise money through an initial public offering of stock on the premise that they will then acquire an operating business.

Blank-check companies were once seen as fly-by-night, according to the Denver Post, but abuses that occurred 15 or 20 years ago have been cleaned up by state and federal restrictions, the paper reports.