Today Microsoft made good on the promise that Kim Cameron and Mike Jones made to the Identity Gang members many months ago: that the IPR necessary for CardSpace (formerly InfoCard) would be made available so that anyone, on any platform, using any license (yes, even GPL), could use it.
But it goes further than CardSpace — it’s the for the WS-* stack (well, most of it — there are still a few more details on coverage to work). They call it the Open Specification Promise, and it’s worth reading in depth. Johannes Ernst has a more detailed post that points to additional coverage.
On a personal basis, I just want to give Kim and Mike a giant high-five for perservering with what many thought was a near-impossible task. They deserve a standing ovation.