I tend to think the MySpace generation is already aged.
However, Microsoft has put up a site called Popfly (www.PopFly.com) that allows mashups of content based upon blocks.
There's a Popfly Explorer VS 2005 add-in allowing users to work with Popfly for building or extending. Silverlight (the old WPF/e) is in the mix as well.
Quoted in the Article:
"There's an obvious desire or need for people to want to create online applications, but it's too difficult today. So our goal is to democratize development," said Dan Fernandez, Microsoft's lead project manager for Visual Studio Express, of the Popfly project.
In an interview with eWEEK last month, S. "Soma" Somasegar, Microsoft's corporate vice president for developer tools, said what is now known as Popfly is Microsoft's attempt to tap the "MySpace generation."