One thing that would make our js support more compelling is much more powerful templating.  In other words, there are some common patterns for things 
people do in Javascript - show a popup, do something to the DOM on mouseX events, etc.  If we could make it easy to check a few checkboxes and say "I want 
to make a component that responds to event X" - kind of the way Matisse does by letting you add event handlers - and leave them empty or with commented 
out code, that could add a lot of value.