I saw a pretty cool like mobile ad banner on the Wall Street Journal's Mobile (WAP) website. The tiny banner just says "$200 Built-in." Upon clicking through, there is a WAP landing page that matches the current marketing campaign of $200 built-in savings to selected HP laptops. The landing page is powered by mLogic, a product offering by Crisp Wireless. They also power the ad serving technology giving publishers the ability to sell mobile ads in house. Unfortunately, the landing page doesn't allow you to buy a computer over mobile browser. They offer a link to a phone number which encourages visitors to buy a computer over voice call.
Mobile advertising and transaction is going to a hot topic for the next two years. I will try to capture as many practical examples for my audience!