Aurora - New MySQL-Compatible Database Engine
(Disclaimer: I work for an AWS competitor.)To me, there is a very interesting contrast to be had between this announcement and Microsoft's announcement: it feels like Microsoft is discovering the business value of being open at the same time that Amazon is living in the time warp of proprietary everything.  Has Microsoft internalized that open source is (or can be) a differentiator in the cloud?  Amazon is clearly still oblivious to it -- and it will be very interesting to see if this service generates fear of vendor lock-in...