Microsoft open source their Windows 7's(and windows server 2008, Office 2003) source code to the China government since June ,2010. But they have not allow China to review their Windows 8 source code yet.
I found it odd that Microsoft justified the GSP in terms of the "unique security requirements of governments". I could also refer to the "unique security requirements of civilians": individual bearers of human rights, targets of espionage and surveillance by well-funded sophisticated adversaries, typically don't have large IT budgets... and if one "unique" part is supposed to be that Microsoft would be pressured to include a backdoor in its products to facilitate spying on foreign governments, well, plenty of civilians (including American civilians) fear that Microsoft would be pressured to include a backdoor to facilitate spying on them.
(I would not use the term "open source" here, because Microsoft didn't make the code open source, it just allowed particular people to read it!)
