[xmonad] using xosd to indicate screen focus

I've been experimenting with using the xosd lib for visual clues as to which screen has focus on xinerma set ups (something that brings grief and confusion to new users!) An example, http://galois.com/~dons/images/screen-xosd.png The idea would be for an xmc extension with hooks into xosd, so you could write text and other fun things this way, with the first application being a view hook. Thoughts? Seems worth pursuing? -- Don