I'm glad to here about real time editing, it is quite new
I'm planning project where opensource maniacs (like me) could have news and articles, open source variuos software downloads, so you are invited
About your cms:
I'd like to see menu editing, but my offer while I not saw it would be - to do that menu link in editing mode would be opened in new window.
Other offer: posibility to use wide and centered themes
I will think more later
Good Luck