Microsoft said to invest in Cyanogen Inc.
Microsoft is still hoping you will pick a Windows Phone over Apple and Android choices, but they know their chances are slim. It appears that they would like to change the game a bit even if it means investing in a custom ROM.
The most important thing is that Microsoft is invested in this project at all, considering they usually finance projects that may or may not be successes on the long run.
Source: The Wall Street Journal