BTS 06 R2 is out
http://www.microsoft.com/biztalk/biztalk2006r2event.mspx
BTS 06 is out though it is not MSDN subscriber downloads yet, among stuff in it(and what is everybody is waiting for) is deep support for WCF, that is no need to expose your orch & end points as ASMX services and use wsHTTPBinding to call them from WCF enabled clients.
What this means for everybody, SOA using MS tools has just gotten more interesting J