You could acheive a similar effect using splits and a bit of key mapping jiggery-pokery in your
dwm.vim's automated 'window' positioning makes working with multiple files a cinch.
…this kind of tiled window management was first introduced in larswm (that is sadly discontinued), which in turn was heavily inspired by Rob Pike’s Acme editing environment. So in a way we have gone full circle, from text editor, to window managers, back to text editor.
Update: Here’s a direct link to the screenshot above so you can see the plugin in action clearly (Tumblr’s new image viewer doesn’t seem to like big screenshots much).