Not normally live tv shows

[JackDanielsU]

How many tv shows normally recorded then transmitted weeks later have done the daunting task of transmitting live.

I know in the US, that ER did it. (with a baseball game going on that night on the tv as well)

In the UK, The Bill, and Coronation St have done live episodes.

Are there anymore?? 

[jenstar]

Who Wants To Be A Millionaire? is normally pre-recorded but they once did a live special to mark their trillionth episode, or something.