[pygame] Game played over the desktop?

[Myles Grant <myles@xxxxxxxxxxxxxx>]

Pygame hackers,

I'm envisioning a game played on top of the user's screen/desktop/etc.  
As far as I can tell, there's two possible ways to do this:

1) Make the game fullscreen and set the background to be transparent.  
Not sure this is possible.

2) Take a screenshot before the game loads, and set that as the 
background -- fullscreen.  Is there a cross-platform way to do this?

Any other ideas?

Cheers,
Myles