I did a technical review for O'Reilly's XMPP: The Definitive Guide by Peter Saint-Andre, Kevin Smith, and Remko Tronçon. In return, O'Reilly sent me two copies of the book, and as I only need one copy I decided to do a drawing for my extra copy. This book is a great introduction to XMPP; I fully recommend it for learning all of the main concepts for building realtime applications in XMPP. Furthermore, they use SleekXMPP for their code examples!
To enter, send me an email (nathan fritz at gmail.com), Jabber (fritzy at netflint.net), comment to this blog post, or identica/twitter me with a link to a project that you've done with XMPPHP, SleekXMPP, or Seesmic-AS3-XMPP along with a brief description. You may enter up to 3 times (using separate projects). You must be the author. I'll do a random drawing from the entries at a later date and get the winner's mailing address to ship it then.
I'm now doing XMPP and AMQP consulting, so if you'd like to contract me for help with your company's project, please send me an email. Best of luck in the drawing!