Several months ago, a CFL broke right next to my 2-year old son. I had the sense to get him out of the room, but not for about 10 seconds.
After much research, I discovered that a CFL has about 4 milligrams of Mercury that is released as a vapor (which is readily absorbed by the body unlike the solid form).
The EPA website's cleanup instructions were vast. They even recommended that all clothing that came in contact with any of the CFL be destroyed. I assumed this also meant the wall-to-wall carpeting in my son's bedroom where he plays.
Do I think the EPA is probably being a bit paranoid? Sure. But this is my son we are talking about during his key mental development years. A little paranoia is in order. Who knows how much mercury vapor he inhaled. Yes, I got rid of the carpet.
I'm personally stocking up on incadescents until LED or Halogon alternatives become viable. BTW-- I vote Democratic ticket and am otherwise pretty liberal.