Matt Croydon posted a link to some awesome
screenshots of the next version of Visual Studio, codenamed Whidbey, and it's ASP.NET web development tools. Microsoft creates killer tools and it is difficult to imagine how IBM's Eclipse, Sun's Rave, IDEA IntelliJ, or MyEclipse will match the kind of ease-of-use Microsoft can achieve. I have yet to see a WYSIWYG HTML editor, the basis for any web development IDE, written in Java (Swing, SWT, or otherwise) that is worth a damn.