I would love a tiling window manager for OS X. Then iterm could get
rid of the tiling feature entirely and hand it off to an application
specialized for the task. There are a few for X which have more
features than you could ever want, and it would integrate with the
rest of the system.
Unfortunately, as far as I know it's not possible to do that under OS
X short of XDarwin. And if iterm just keeps embedding other apps,
it's just turning into a window system of its own, at which point
you're just back at X only less standard. I would love to have an
apple hacker tell me I'm wrong and you *can* have one program manage
the windows of another program in OS X...
You'd think apple would be into tiling with the new iphone-esque
emphasis, but apparently they're going in an expose kind of direction.