This shouldn't come as a terrible surprise, but the Facebook Phone looks like it will be running atop Linux.
For many months now there's been speculations about the Facebook Phone that will inevitably come out of Facebook. It's not a matter of if but when. Speculations have been rampant about this mobile phone. Some have speculated that Facebook could be building its phone upon Windows Phone 7, but I've found out this weekend from a reliable source that it will be a Linux-based device. Though whether this is Android-based or just based upon an upstream Linux source with a custom UI layer atop, that isn't known to Phoronix at the moment.
It's nice to see Facebook continuing to embrace Linux and open-source even with their deep involvement with Microsoft and the Redmond company owning a stake of the social networking company. Other Facebook open-source/Linux initiatives include Flashcache for Linux
, the HipHop compiler
, the Open Compute Project, etc.