Just in case you missed it...

Google has open sourced protocol buffers.

Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats.

Protocol buffers are a great technology. It is one of those things that you typically don't stop to think about - what kind of technology goes into a car, a computer or a plane when you are using it?

And that's not the only cool technology that Google has released - check out our Google C++ Testing Framework and Google commandline flags module for C++.