If you're testing out all the new features of VS 2008 (now in beta 2) then you might want to play with the latest CTP of Acropolis, which is the next version of the Composite UI Application Block (CAB), which if you're a WinForms developer you are hopefully already using to save you a lot of grief on those larger projects. Acropolis integrates the CAB into the Development Environment, and adds full-blown WPF support for your SmartParts. If you're a WinForms (or "Smart Client") developer, you should definitely take a look!