First basic information on ASMX v2
Yasser, Matt, and Elliot have published an introductory article on the new feature of the ASMX Web services engine in Whidbey: New Features for Web Service Developers in Beta 1 of the .NET Framework 2.0
Especially cool and powerful is the HttpListener-based activation model which leverages http.sys - Don already talked about it several times.
More detailed information on ASMX v2 including samples and figures can be expected soon ...