.NET Magazine
A while ago I wrote an article on Failed Message Routing in BizTalk, it was published in the dutch .NET Magazine (click). An article on BAM of a former collegue of mine, Sander Schutten, was published in the same issue (click).
Christian Siegers, a collegue of mine, published an article on the CRM adapter in the latest version of the magazine; We are both working on a new article on TDD with BizTalk to be published in december 2007.