Pluralsight has just released a host of On-Demand BizTalk training courses. The first set of courses covers the basics and is titled “BizTalk 2009 Fundamentals”. The second set of courses covers more advanced topics and is titled “Advanced BizTalk Server 2009”. If you are looking to brush up on your skills or someone asks how they can ramp up, this is a good option. Pluralsight has a free guest pass which would let you try the courses before you buy.
If you are looking for something free, Microsoft just released a set of BizTalk Learning Snacks. These are short, interactive presentations about popular topics. In addition to the BizTalk snacks, they also have snacks covering SharePoint, Visual Studio, Exchange, etc.