The Microsoft Web Platform Installer has been a fantastic way to get all the frameworks (like ASP.NET or PHP), libraries, IIS settings and developer tools installed on your machine in one step.
Well. the web platform team has just released the latest version which includes Visual Studio 2010 Web Express, ASP.NET 4 and all the other goodies like Silverlight 4, jQuery, ASP.NET MVC 2.
Not only does it do a great job of installing the frameworks and dev tools, but look at the apps you can install with it: DotNetNuke, Joomla!, Subtext and even WordPress.
This is the absolute easiest way to get up and running with web development. What are you waiting for? Download it today and get started!