Do you want Gordon Brown to resign?
If so, please click here and go to the latest Downing Street petition to request exactly that. There seems to be a bit of a buzz about this one on the Blogosphere, and maybe this one will lead somewhere if it picks up a head of steam.
Update 27-Apr-09: Signatures up to 18,261
Update 28-Apr-09: Signatures now up to 27,835, and I see the server crashed at one point.
Update 03-May-09: Signatures now at 47,064. Not bad for about a week, but no fast or big enough to be a story on its own.