Amazon.com just posted my four star review of Securing IM and P2P Applications for the Enterprise. From the review:
I had high hopes for Securing IM and P2P Applications for the Enterprise (SIAPAFTE), and thankfully this book delivers. SIAPAFTE is a modern, well-written, thorough guide to instant messaging (IM), peer-to-peer (P2P), and Internet Relay Chat (IRC) networks and related security issues. I recommend all network and security administrators read this book.