This year the Ukulele Orchestra of Great Britain played at the Proms for the first time. You can listen to the concert here at the BBC until August 25th. I’m listening to it right now. (Via MetaFilter.)
Also: Yusuf Islam (formerly known as Cat Stevens) and the Ukulele Orchestra of Great Britain play Peace Train on German TV. (3 nach 9, Sendung vom 29. Mai 2009. Wer sich für das darin angekündigte Gespräch mit Yusuf interessiert, findet es hier.)