Going Google - Researching Security and Privacy

As we as share our Google Apps for Education migration plans with nearby school districts we often hear questions about data privacy and security.

We typically hear questions such as:
"Who owns the data once email is sent/stored on Google servers?"
"Does Google give third parties access to data?"
"Is user data/email scanned and indexed by Google?"

These are valid questions and concerns. Many of our questions were answered on Google Apps Admin Help site. They also have a very nice Google Apps security whitepaper available for review.
We were also particularly impressed with the planning for natural disasters. While we do our best with offsite backups I'm certain we don't do this as well as Google.

Doug, over at the Blue Skunk blog, also provides some insights on Google and your valuables (data).

Are there other questions I should be asking?

Image source: SteveC77 Flickr Photostream