Jon Flanders and I coauthored an article on BizTalk Services that just went live on the MSDN Magazine web site. We begin the article by discussing ESB’s and the trends towards SaaS, and then we describe how BizTalk Services embodies the best of these different worlds through what Microsoft likes to call the Internet Service Bus (ISB). Then we show you how to begin using BizTalk Services within your WCF applications through the new RelayBinding.
If you haven’t touched it yet, there’s plenty of sample code within the article to help you get started with BizTalk Services on your own. Simply browse to http://labs.biztalk.net, create your own user account, download/install the SDK, and you’ll be good to go. Enjoy.