I cannot believe that Sony is so far behind on updating DVD Architect 2 to support dual layer DVD burning. This is an update that I can use now. Let's get rolling Sony!
It's not just Dual layer that needs suport from Sony.
I have a Pioneer 109 and I can't even burn a 'normal' single layer DVD from DVDA, though my older model Pioneer (A05) worked OK - so support for later model DVD burners is sadly lacking as well.