Personally I would prefer to call it "Zero-gravity architecture" because it floats and never produces anything concrete. The piece is really good and I fully agree with Joel.
Here's a nice excerpt:
But Windows Live Mesh is not just a way to synchronize files. That's just the sample app. It's a whole goddamned architecture, with an API and developer tools and in insane diagram showing all the nifty layers of acronyms, and it seems like the chief astronauts at Microsoft literally expect this to be their gigantic platform in the sky which will take over when Windows becomes irrelevant on the desktopBut please go read it online, it is quite eye opening.
Happy location reporting - Martin