For a while ive had a bunch of resources of my own and some links to other community resources which are very useful for BizTalk testing.
Ive pulled these all together into one chm file which can point you to all of the appropriate resources to make life easier.
This is available on the below link:
http://code.msdn.microsoft.com/BTSTestGuide
If anyone feels ive missed a good resource please let me know and ill update it.