In the heels of the Developer.COM Award for Metro for its interoperability capabilities here are two blog posts from Guy Burstein specifically describing how to do it: From SilverLight and From .NET Client.

Metro interoperability is a key reason for the Metro Adoption. We have had a number of GlassFish customer wins that started on a desire to interoperate with Microsoft's stack.

And it is always nice to see GlassFish mentioned at MSDN :-)