I've been very pleased by the comments I've received from people at the Enterprise Connect show this week in Orlando who have read the book. A couple of people mentioned they've bought it for the Kindle while at the show. And analyst Blair Pleasant mentioned the book a couple of times in one of her sessions (Thanks, Blair!).
As an author, it's wonderful to hear that the book is really helping people understand UC security issues.
Thanks again for all the kind words and mentions!