Perhaps in conjunction with the introduction of a new Slingbox M2, we’re being told that Slingbox mobile clients for Android and iOS will soon be free -as opposed to the current $15 or original $30 SlingPlayer price points. Presumably the company can assume these costs in order to move more hardware and given the introduction of ad serving… well, all over the place. But here’s where it gets real interesting, as they look to the Amazon Kindle model: Echostar’s SlingMedia will provide an in-app purchase option to remove those ads. As to existing customers and the desktop or web clients, we’re just going to have to wait and see. But this is certainly an interesting twist for new customers looking to Sling for the most versatile TV everywhere solution.