yaay! kees bos has started a User-Interface generator, based on the glade concept for GTK, for pyjamas. called PyJSGlade.
in essence, it's very simple: an editor, allows addition of panels and widgets and the editing of their properties, save the layout as an XML file, and then a second stage once you're done throws out a .py file which represents the application.
pretty straightforward, and very very cool.
what will be particularly interesting at some stage will be how to include HTML files and link widgets to existing bits of DOM. that's gonna be fun and games, and something that GTK-Glade _can't_ do.