The National Security Agency will, in most cases, be able to access your most private of online data if they want to. Google wants to make sure they aren't forced to comply with the many requests they receive for data, however, as they scramble to encrypt their data centers and protect the precious information -- probably including yours.
The Washington Post's Craig Timberg (via PC Mag) states that Google has sped up plans to encrypt the data flowing to and from the company's data centers around the country. This appears to have been one of Google's weak spots, which would incidentally give large government agencies easier routes to email, web searches, and more.
There's no concrete information on what Google's actually doing to lock down their information or how much it's costing them to do so, but it's interesting to note that this behemoth of a company is going to great lengths to protect all this data. What lengths are you going to in order to keep your information encrypted?