I very much recommend reading the article by Howard E. Hinnant, Bjarne Stroustrup, and Bronek Kozicki on the subject of C++ rvalue references at the C++ Source. This article has more and better examples than mine does, and it has an extensive list of links to proposals and technical papers which you will find interesting. As a tradeoff, the article does not go into all the details the way I do; for example, it does not explicitly state the new reference collapsing rules or the special template argument deduction rule for rvalue references.

As mentioned earlier, Dave Abrahams' sequence of articles on value semantics on his blog explains all the subtleties of how move semantics tie in with existing optimizations like return value optimization and copy elision. Another one of his blog entries explains the way rvalue references interact with exception safety, and and how the new noexcept keyword makes everything work. Be sure to follow the link under "update #2" at the top of that blog entry. Finally, Dave Abrahams' blog also explains the problems arising from implicit moves.