Hi ericgeas,

Definitely, it's possible to use the WPF controls from  the NetAdvantage for WPF 2008 Volume 2 release
with Microsoft Expression Blend 2.

I would advise you to take a look at the following topics from the online documentation:

1. Adding an Assembly to an Expression Blend Project
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/WPF_Adding_an_Assembly_to_an_Expression_Blend_Project.html>

2. Editing Control Styles and Templates with Expression Blend
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/WPF_Editing_Control_Styles_and_Templates_with_Expression_Blend.html>

3. Add xamDataGrid to the Artboard(how to add the xamDataGrid control to an Expression Blend project)
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/xamDataGrid_Add_xamDataGrid_to_the_Artboard.html>

4. Add xamDataPresenter to the Artboard(how to add the xamDataPresenter control to an Expression Blend project)
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/xamDataPresenter_Add_xamDataPresenter_to_the_Artboard.html>

5. Add xamDataCarousel to the Artboard(how to add the xamDataCarousel control to an Expression Blend project)
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/xamDataCarousel_Add_xamDataCarousel_to_the_Artboard.html>

6. Creating a Basic Chart Using Expression Blend
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/xamChart_Creating_a_Basic_Chart_Using_Expression_Blend.html>

7. Creating a Named Path on the Artboard
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/xamCarousel_Creating_a_Named_Path_on_the_Artboard.html>

8. Known Issues and Limitations
<http://help.infragistics.com/Help/NetAdvantage/WPF/2008.2/CLR3.X/html/WPF_Known_Issues_and_Limitations.html>

Best Regards,
Yanko