In fact pbor in #gnome-hackers voiced a vision I would support:
<pbor> sadam: actually I'd prefer to have a sexyer widget upstream :)
<pbor> sadam: it's something I wanted to try for a while but really can't find the time
<pbor> sadam: I want a GtkCurtain widget that drops down from the top (or the side) and covers the text *without* pushing it down
* lucasr|afk creates the page
<pbor> sadam: obviously it should drop down with a smooth animation and maybe be even slightly traslucent for the crack-addicts :)
<pbor> sadam: maybe it could be part of the "Make some core GNOME modules sexier" SoC proposed by vuntz
Of course I would be happier with a curtain widget that gave the coder the choice of whether to push the text down or not.