Would it be possible to do something like this using XamDataPresenter or XamDataGrid http://www.codeproject.com/KB/silverlight/MultipleHeaderSLGrid/FinalResult.PNG
Hello,
Yes, it does. Please check this blog post :
http://blogs.infragistics.com/blogs/alex_fidanov/archive/2010/06/02/howto-common-headers-in-the-xamdatagrid.aspx