Just watched this enlightening Webcast featuring an interview with Microsoft CEO Steve Ballmer and Cisco CEO John Chambers, discussing how the two organisations view both competition and co-operation across a range of technology areas including NAP / NAC security and Unified Communications. There's also a couple of great demos from Bob Muglia and Charlie Giancarlo demonstrating the level of interoperability that can be achieved (these start around 46.15 into the Webcast). Recommended viewing with more resources here.  [RH]