Microsoft BizTalk ESB Toolkit 2.0 released to web yesterday evening, and if you have not been following the earlier CTPs, now is a great time to get on board. The name has been changed, a support model has been introduced, and official MSDN forums for the Toolkit have been made available.
Since there are not any VMs that you can simply download and get up and running with quickly, I decided to put together a quick and dirty installation guide for installing the Toolkit on a single server in a 32-bit virtualized environment for evaluation purposes. What follows are the steps to get you from 0 to ESB with all of the sample applications.
Once you have the BizTalk ESB Toolkit 2.0 installed, I would recommend you read the following documents (in order) in the official documentation to give you a tour of what all is there, and even get fairly deep into the inner-workings of the Toolkit, and extensibility opportunities: