- move a module from pane to another pane without postback
I had considered doing this a while back, but I ran into a hurdle in that the module actions for the module would need to be updated, as it states things like move module up or left based off of where it currently resides.  Since I have no idea what menu is being used for the module actions I cannot hardcode the logic for a single instance (say solpart).  I am not sure that this is enough reason to not do the enhancement (I could just ignore the users who complain that the actions are wrong until a postback occurs)...

- move more fluid
This is also something I had considered investing time in.  It currently is not high on my priority list, as I am leaning towards adding more functional enhancements like the DNNTabStrip control.  Perhaps I should post a survey to see what others in the community feel I should be focusing on.

- add a module in page without postback
I don't think this is possible (without some really creative hacks...)  the module's naming container logic controlled by ASP.NET guarantees that the Ids generated are unique based off of all the other naming containers on the page. 

Thanks for your feedback