[xmonad] a layout changing menu

[Nathan Huesken]

Hi,

It would be cool to have a keybinding which popups a menu from which one
can change the current layout by another key press.

I guess, for this an extern menu-program is needed. But hey, there is
dmenu.

So is it possible to start dmenu from xmonad and based on its output,
change the current layout?

I do not know any haskell, so if it is not to much trouble, a skeleton
code would be cool :).

Thanks!
Nathan