You can now download RC1 for the Web Application Project for Visual Studio 2005.  This allows you to treat ASP.NET applications in VS2005 like back in the days of VS2003.  That's right, you can have an associated .csproj (or .vbproj) file for your project!  This new project type is quite useful for migrating large ASP.NET v1.1 applications (by large, I mean lots of pages and user/web controls) to v2.0 with ease.  To learn more about the Web Application Project (WAP), check out these great in-depth tutorials by ScottGu.