You should submit a feature request to Infragistics: Request a Feature or Component
Done.
It seems to me that if Infragistics.Documents could support EMF files and/or the full gambit of GDI/GDI+ commands this would make your component incredibly powerfull.
A couple of nice options would be:
One question:
ICanvas.Graphics returns some sort of Graphics object... what percentage of GDI commands are supported in this object?