In the course of following a link on the distribution of American geniuses (thanks Michael :-)), I read the OKCupid privacy policy (since they publish amusing and interesting statistics on the information provided by their users).
The privacy policy is a really good example of how to actually explain what may happen to someone’s information, including how it is archived and what would happen if the whole website changed hands … I like it!
The stats are also interesting – there are obvious issues with the self-selecting sample, but it makes a change from “the sample were first year psychology students participating for course credit”)