The preview releases of Dynamic Data contain much of the new feature sets that will be available when we release .NET 4. The cool thing is you can start using a lot of the new features against .NET 3.5 SP1 now using these releases. When we look back and see how people view Dynamic Data we regret that people immediately think of it as scaffolding of data. This is something that it does do, and I think it does a pretty good job at it. But Dynamic Data is a lot more then that, providing a new templating mechanism called Field Templates which allow the default markup for many of our built in data controls to be more easily customized.