Introducing Cloud Spanner, a Global Database Service
> Today, we’re excited to announce the public beta for Cloud Spanner, a globally distributed relational database service that lets customers have their cake and eat it too: ACID transactions and SQL semantics, without giving up horizontal scaling and high availability.<p>This is a bold claim. What do they know about the CAP theorem that I don't?<p>Separately, (emphasis mine):<p>>  If you have a MySQL <i>or PostgreSQL</i> system that's bursting at the seams, or are struggling with hand-rolled transactions on top of an eventually-consistent database, Cloud Spanner could be the solution you're looking for. Visit the Cloud Spanner page to learn more and get started building applications on our next-generation database service.<p>From the rest of the article it seems like the wire protocol for accessing it is MySQL. I wonder if they mean to add a PostgreSQL compatibility layer at some point.