I was recently interviewed by James Vastbinder, an ISV Platform Strategy Advisor for Microsoft.
We discussed the needs of ISV’s and what’s new in the pending Orcas release (i.e., CLR v3.5 and Visual Studio 2008 v9.0).
And for those interested in hearing more on Application extensibility and the Add-in (Add in) model, including some newly released features, like WPF support, check out the following link.
Note the disclaimer on WinForms and WPF utilizing Crossbow over the CLR Add-In model.
Here is a bit more on this subject:
The use of "Crossbow" for WPF and WinForms interoperability has been a frequently asked question.
In Orcas, we haven't thoroughly tested Crossbow scenarios utilizing the WPF Add-In offering.
That said, WinForms applications with multiple AppDomains are supported as long as no WinForms controls are passed across the boundary. In the WPF Add-in implementation we do not pass Add-in controls across domains, therefore, the use of "Crossbow" *should* work. Your mileage may vary :-)