Found this on Slashdot:

Microsoft "may offer new security abilities on a paid basis," according to the company's chief technical officer Craig Mundie. The possibility is under consideration within Microsoft's security business unit, recently set up under its own vice president, Mike Nash.

The idea is still only hypothetical, but represents an acknowledgement that Microsoft sees security not just as a necessary condition to reassure existing and future customers, but also as a potential source of revenue.
http://news.zdnet.co.uk/story/0,,t269-s2123526,00.html

Customer: Hi, I'd like to buy a car.
Salesman: Well, we have just the one for you. Look at this baby over here.
Customer: The price seems kind of steep.
Salesman: Yeah, but this baby has every possible modern convenience. It has heated leather seats, the finest Bose sound system on the market, heads up display that will use GPS to give you directions to any place on the planet, and a cell phone built into the rear view mirror.
Customer: Ummm... why doesn't it have any tires?
Salesman: Oh, those cost extra.
Customer: There's no windshield.
Salesman: Yeah, we thought that would take away from the driving experience. You know.... wind in your hair and all that.
Customer: Bugs in your teeth.
Salesman: If you want that we can add one for a nominal fee.
Customer: How nominal?
Salesman: Well, that depends on how many passengers you plan on carrying and how many miles you drive each year. We can price it according to either standard.
Customer: Ummmmm.... OK, thanks for the info. I think I'll keep my old one.