You might ask what's next?

FIFA will consider using an electronic microchip inside soccer balls at the 2006 World Cup finals if the technology proves successful. The microchip, intended to confirm whether or not a ball has crossed the goal line, will be tested at the under-17 world championship in Peru in September and October.

http://cnews.canoe.ca/CNEWS/TechNews/NewStuff/2005/06/14/1087808.html