Just saw this article on Marketing Experiments:

http://www.marketingexperimentsblog....-ppc-17-07.php

And had the 'ole gears working. This could be a boon to affiliates of merchants that provide phone tracking. Like the article mentions, the extra highlighting that Skype injects calling out attention to the ad, and just the idea that the ad might not even be clicked, but an affiliate can still receive commission credit through the phone tracking.

Of course, I'm don't really know the penetration level of Skype, but I imagine it might be higher for anyone doing international business, or into tech stuff.

Thoughts?