I doubt you'd want to implement this as it's probably a lot of work, but perhaps you could add multiple projects in one workspace under poide to your wishlist. Something like MSVC where you have one workspace but multiple projects depending no eachother.
Box
I agree, this would be very useful. It's already on my wishlist, actually. But as you say, it looks like much work. I will probably add it - just not sure when...
Pelle