Brian Kernighan's Homepage
Brian Kernighan was a Berkman Fellow during 2010-2011, where he wrote the first several drafts of "D is for Digital: What a well-informed person ought to know about computers and communications." The book will be available in late September 2011; look for it on Amazon or through kernighan.com.
Sadly he has had to return to his day job as a professor in the Department of Computer Science at Princeton. Naturally he misses Berkman, but not Cambridge winters.