I finished the work on the gecko 1.8 version of Etna. There are still few little issues but it works well.

screenshot of Etna 0.4a

I also finished implementing all XMLSchema datatypes. I'm going now to improve the API for extension author, to improve the editor component (support of semantics attribute in schemas, support of the enter key etc..).

Update: of course, this version of Etna is a XulRunner application ;-).