@Craig_Matthews: What GoddersUK said wasn't the creepy part. It is a very ambiguous notion that Google can do whatever they want with your stuff and give it to their partners so that they can do whatever they want with it to. As long as they can say they are using it to try to "improve" their services.
Googles terms of service is:
When you upload or otherwise submit content to our Services, you give Google (and those we work with) a worldwide license to use, host, store, reproduce, modify, create derivative works (such as those resulting from translations, adaptations or other changes we make so that your content works better with our Services), communicate, publish, publicly perform, publicly display and distribute such content. The rights you grant in this license are for the limited purpose of operating, promoting, and improving our Services, and to develop new ones. This license continues even if you stop using our Services (for example, for a business listing you have added to Google Maps)
I'm not sure that this applies to Drive. For instance, "Some of our Services allow you to submit content. " ... "Also, in some of our Services, there are terms or settings that narrow the scope of our use of the content submitted in those Services." It sounds like every service has a different set of terms, and this is just a general description that doesn't apply to anything specifically.
I don't know if anyone can confirm that.