Microsoft has launched the Express Editions of Visual Studio 2005. Each of these is a simplified and streamlined version of Visual Studio 2005 focused on development in a single language (except Visual Web Developer, which includes Visual Basic and C#). A full run-down of the feature differences between these Express Editions and the full Visual Studio 2005 can be found in the product feature comparison matrix.
In short, all the essential features for building ASP.NET 2.0 Websites are here. The Express Editions include a simplified user interface and limited features (e.g., you can only interface with databases on your local computer), but for developers building simple sites or just getting started with .NET for Windows desktop or Web development, theres more than enough meat in these products. Visual Web Developer Express Edition, in particular, is a must-download for anyone currently working with ASP.NET Web Matrix, though developers should note that these Express Editions are not backwards compatible with version 1.x of the .NET Frameworkthey can only be used to develop for .NET 2.0.