French Coldplay fans alert! Listen to Virgin Radio all day today, and when you hear two Coldplay songs in a row, just call the radio. If you're the first one to call, you can win 2 tickets, flight and hotel to see Coldplay live in Philadelphia. Link: virginradio.fr
Also on RTL2 (another French radio station) a Coldplay announcement will be aired soon.. but as yet no details yet.
More on these competitions here [thanks Chavi]