<p>Is it possible to migrate a VB.NET Winform solution to a 3.5 WPF solution.  If so, any suggestions how to do it?</p>

<p>Thanks in advance!
JFV</p>

Microsoft is doing everything for us so that we have to throw away everything we've written 2 years ago.
According to Josh Smith,
Is there a way to convert Winforms application to a WPF application?
No.  Those two UI platforms are very different and there is no app which converts a WinForms app to a WPF app.  Of course, this will not prevent you from reusing any business/DAL/logging/Ioc/etc libraries you use in WinForms.
However, you might want to check out
this
, quite basic but functional WinForms->XAML converter, written by Rob Relyea from WPF & Xaml Language Team.
According to him, "We (Microsoft) haven't built a real converter because we think most people will not just move over controls, but often will rethink their application as they move it.  We'd love feedback..."
Also, you might want to check out
Guidance for migrating an app from Windows Forms to WPF
, also by Rob Relyea.