Silverlight/WPF/WP 7 Integration

Has anyone heard as these tools get better and better if they are planning on either creating a more reusable code-base between all of these products or at least more of a common code-base? It seems how close these products are, that some sor开发者_开发百科t of shared component feature should be available?

Maybe that's a feature in the upcoming Silverlight 5.0?

Thanks.

The Portable Libary Tools project was announced at PDC last year. You can view the details of the session by Shawn Burke in the 3-Screen Coding: Sharing code between Windows Phone, Silverlight, and .NET session. The CTP of the tool s(see first link) was released in January.