As NetWeaver uses more and more Java and WebDynpro, how will GuiXT support these newer technologies? Ditto for Enterprise Portal 6.0 ?

For Enterprise Portal 6.0, you can use the SAP GUI embedded control or ITS based GuiXT, which offers almost the same possibilities (with exactly the same scripts) as the Windows SAP GUI environment. Concerning WebDynpro, the same need for customization will exist for WebDynpro technology, since the perennial task of tailoring a very general application to the specific needs of a given company will not go away. We are negotiating with SAP about continuing GuiXT in a future Web Dynpro world.