Coldplay did an interview on Nova 96.9, a radio station here in Sydney, Australia a few days ago. When they were asked about Viva La Vida, the band basically explained that it was all about power and loss of power etc, but at the end, Will Champion, I think it was, coughed, "French Revolution"...
Viva La Vida
Violet Hill
Lost
A Spell a Rebel Yell
Haven't heard Life in Technicolor yet...and Viva La Vida seems like a very popular song, as it shud be. Easily one of Coldplay's, best for me.