I do not know how much effort Microsoft will put into this; but I believe it is great news: Microsoft, JBoss Unveil Interoperability Pact
On Tuesday, Microsoft and JBoss announced that they are looking at ways to enhance interoperability between the Windows Server and the JBoss Enterprise Middleware System (JEMS). Microsoft also said it plans to bolster support for JBoss in the Windows Server. …The companies’ technology engagement will include "technical assistance and guidance" designed to optimize the performance of JBoss on Microsoft's Active Directory integrated sign-on and federated identity capabilities and of JBoss' Hibernate object/relational ...