Theres a whole lot of new stuff in Networking in Orcas. Some features are going out as part of redbits updates while others are going out as part of the 3.5 green bits download. For those of you who are not aware of the red bits/green bits concept in Orcas, Soma gives an overview at http://blogs.msdn.com/somasegar/archive/2006/05/18/601354.aspx .

Our recent article in MSDN (http://msdn.microsoft.com/msdnmag/issues/07/09/Networking/) outlines the new features that are coming. IRI and Socket enhancements will come in Red bits while the new Peer 2 Peer APIs (PNRP and Collaboration) will come in Green bits as part of the brand new System.Net.dll