Gnome, Mozilla and the Challenge of Longhorn

With lots of talk recently about mono/java/python, it seems like a response to Longhorn and XAML is brewing. People at mozilla are talking about how to create an alliance against the hegemon. Co-operation with gnome is discussed on mozillazine. I do hope that gnome can use the XUL language or something like it so that gui programming is easy for us mere mortals. Lets not re-invent the wheel reproducing XAML when we've already got XUL!