I've opened a case w/Infragistics, but I'm sure that somebody has got this working...

I don't see anything on the map.  I'm guessing that the Uri is wrong.  I'm using

reader.Uri = "Shapefiles/usa_st";

 How can I tell if it is right or not?  At this point there is not a single portion of the WPF help file that is right.  I really want to get to work because I think that it's a good fit for our project, but I'm running out of time to get this working.