Microsoft will publish its code under the GPLv2 to the Linux kernel

For many, there will be a big surprise news that Microsoft intends to publish "thousands" of its code into the main Linux kernel (main Linux kernel tree). Naturally, under the GPLv2 license and “with the blessing of open-source leaders” (with the blessing of open-source leaders).

This initiative is aimed at promoting and improving support under the linux-platform of the Hyper-V virtualization server, a relatively new, successful Microsoft product.

Previously, Microsoft entered into virtualization partnership agreements with Novell and Red Hat Linux vendors.
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Such things, guys :)

via techflash.com

PS:
Microsoft Official Press Release www.microsoft.com/presspass/features/2009/Jul09/07-20LinuxQA.mspx
20,000 lines of code will be published (device driver code)

video with Sam Ramji, Microsoft Senior Director of Platform Strategy on this topic channel9.msdn.com/posts/NicFill/Microsoft-Contributes-Code-to-the-Linux-Kernel