I remember seeing this before, and for curiosity's sake went for a look: <a href="http://news.ycombinator.com/item?id=3546149" rel="nofollow">http://news.ycombinator.com/item?id=3546149</a> (Posted six months ago.)<p>Was this, umm, the same weekend?
This is neat, but I think these days if you're going to use a grid it might as well be responsive. For example this is a good responsive grid generator: <a href="http://gridpak.com/" rel="nofollow">http://gridpak.com/</a><p>Or you could always use Bootstrap.
First thought: dragging doesn't resize boxes. broken.<p>Second thought: dragging doesn't move boxes. broken.<p><a href="http://jqueryui.com/demos/draggable/" rel="nofollow">http://jqueryui.com/demos/draggable/</a><p>Other than that, very neat project. Hope you continue to build and develop this further.
Kinda neat, I don't see yet any added benefit over Bootstrap however - the problem it solves in a visual way is not really a problem for a mildly experience web developer and for the beginners it's not enough functionality IMO. As a thought experiment it's cool, as a viable product it would need some work.