24. September 2010
Grab the 120 day trial here.
And the developer edition from Microsoft Download, here
It is not yet to find on MSDN … awaiting it unpatiently. And is the MSDN version the same as the one on Microsoft Download? And how is the developer edition licensed these days? The License page still mentions a developer edition cost of USD 499,- … but that is for BizTalk 2009.