Ten Years Later - XML 1.0 Fifth Edition?

Just read Norm's blog entry on this:

http://norman.walsh.name/2008/02/07/xml105e

I think we do need full support for Unicode. XML 1.1 provides it, but 
nobody particularly wants XML 1.1. It's odd to introduce a new character 
set as an erratum, but is there any better way to get there from here?

Jonathan