I've just read the recent issue of Shutterbug, Special Issue: Travel Tools and Tips, May 2007. It contains an excellent, if simplified, explanation of the differences between copyright and privacy rights as told by a photographer. The author of the article states clearly that she is not a lawyer, but that she is a working photographer who deals with this on a daily business.
I have spoken to an entertainment lawyer and everything the article states is basically what the lawyer told me in a clinic I took last year. If you have any questions or concerns, please give this article a look. It's short, well written and very informative about things I never even considered.