Erhm
Very nice thought. But since we have no idea how the inside of vB3 will look, and hearing vBdevs say that it is very dynamic and more easy to control and flexible, template system. I think most code-hacks will become easy to transfer through template changes, and maybe even by just linking a .php file to apply changes, without having to alter any source. however, there are always ways where you just have to

This is a nice idea, but I have seen this in action on a web site. And after searching for a little while now, I can't find it again!! When I do, I will post it here for sure.