There is an interesting description about an android port to nvidia tegra platform. http://www.engadget.com/2009/02/17/nvidias-tegra-in-the-flesh-booting-to-android-and-pumping-out/

I tuned my google news alert for nvidia tegra, and I am getting more and more exciting information about the feature of the new platform. It is predicted that Microsoft’s Zune HD, which is based on nvidia tegra, will be an iPhone killer soon… The funny thing is that there is no clear pricing information, however I heard that nvidia tegra based devices can be as low as 200$ per unit.