It's good stuff.
Garry Reed wrote a pretty good piece on it, so I don't have to.
Pursuant to Reset The Net, Google has released alpha source code for an end-to-end encryption Gmail Chrome extension. Nice to see that it's open source, and I look forward to seeing the crypto community tearing it apart to see if it works. "Works," of course, being somewhat relative given the inherent security problems of being connected to the Internet all the time and doing pretty much everything "in the cloud" as Chromebook/Chromebox users like me do.