This Wednesday the LHC is officially turned on and the full machine will be used for the first time. BBC Radio 4 will be covering the event live throughout the day.
If you are interested, but don't have a radio (I know I don't) then Wednesday just visit the BBC Radio 4 Homepage and click the Listen Live link at the top right. To listen you will need a real player compatible player. If you are a Windows user I can recommend Real Alternative.