It's summer! 

 It's the end of the term for both Harvard and MIT... so in view of the fact that we on the authors committee are about to embark on summers of tireless dedication to research while scattered to the far reaches of the planet, posting to this blog will be reduced until fall. 

 A special thanks to the loyal readers and commenters of this blog -- you folks have made this year a really rewarding experience for us. We won't stop posting, so do hope you still stop by occasionally and are still with us when we resume on a full schedule at the end of the summer.