From your mock I up I would assume you want winterboard online? Capable of retrieving updates separate from Cydia? I personally don't see the need. It already takes Cydia forever to load (for me) and I can appreciate not having to deal with that with Winterboard.
i have thought about the exact same thing. the simple stack setup can get pretty cluttered when you get a bunch of stuff in there. i would definitely use this if it was modified like the link you posted. good work