Norway's NRK are well known for their April Fool's Stunts:

This year's one was a piece on their main news about the increase, and success of alco-pops amongst youngsters. They had a reporter, a representative from Tine (major milk supplier), a politician and a manager from a 7-11 in Oslo. The product they were discussing was the market launch of alco-milk, designed to capture some of the lucrative alco-pop market.

In previous years, they have informed the public that they could get a free switch into which they could plug their radios and TV sets so that the instant an accordian started playing the radio or TV set would change channel - they were inundated with people calling in to get one.

Their best one, was an announcement that due to a bottle shortage, the Vinmonopol was being forced into giving away stocks of wine held in bulk. All people had to do was to turn up at their local Vinmonopol with containers for the wine. Only one guy actually turned it, by lending truth to the story. He turned up at his local Vinmonopol with two buckets, one for red and the other for white. When he was told it was a joke, he ordered and paid for six bottles of each, opened them and poured the contents into his buckets and walked out of the place, past the huge line waiting outside the store.