Try the BETA version of the WSS Service Pack 2. Get it here: http://www.microsoft.com/downloads/details.aspx?familyid=abba20f2-3625-4c9c-a412-ab9bbebdb5e8&displaylang=en
Hmm…I should have tried this before posting it. If you follow the link, you can download an overview of the WSS SP2. It does describe how to use WSS on ASP.NET 2.0 Beta though.