As a fan of OpenBSD and open source in general, I find this most interesting. Microsoft just became the first "Gold" donor to the OpenBSD Foundation ever. Every single company that uses OpenSSH - from Google and Facebook to Oracle, IBM, and HP to Red Hat and Cisco - none of them have ever contributed to the support of OpenSSH as much as Microsoft has. Really, we're talking peanuts here. Microsoft is the first to donate more than $25,000. Google and Facebook come in in the $10,000 to $25,000 range. You think the open source community supports itself? Come on, Google...
It's kinda lame to post Slashdot links, but this is a good one.