I caught this article in AdAge today:
The U.S. Postal Service last week canceled an old law that forbade businesses from placing ads or logos on any type of currency -- including postage -- relinquishing to marketers once-hallowed ground unsullied by commercialism. HP postage stamps feature images of the HP logo as well as its founders and the garage in which they started the company.
The effort is part of the USPS' push to stem a loss of income as consumers increasingly turn from so-called snail mail to Internet correspondence. First-class mailings have plunged since the mid-1990s from almost 55 billion pieces mailed in 1998 to just over 43 billion last year. more

