Even without MCMS SP2 being available you can already evaluate ASP.NET 2.0 with MCMS!
You cannot use it on a read-write website as webauthor does not yet work with ASP.NET 2.0 but you can configure a website that is configured with ASP.NET 2.0 as MCMS read-only website.
So for authoring you need to have a normal ASP.NET 1.0 or 1.1 web site with a template project created with VS.NET 2002 or VS.NET 2003.
To get this working you need to follow the steps below:
Important: You should not yet use ASP.NET 2.0 on a production site! ASP.NET 2.0 is not supported by Microsoft without MCMS SP2 installed. The steps above should only be used to evaluate the benefits of ASP.NET 2.0 for a MCMS site now. There is also no guarantee that code developed now for a site as configured above will run without changes after SP2 has been installed!
I played around with master pages on my ASP.NET 2.0 MCMS web site (see here for details on how to setup...
As mentioned by Arpan there are no plans to support ASP.NET Web Parts with MCMS with SP2.
In my previous article I explained what to do to get a read-only MCMS website working on ASP.NET 2.0....