While it’s in the same price bracket as the 500D Nikon have just released the D5000 with HD Video option. It’s in Irish shops now, I saw it in Conn’s and the Dublin Camera Exchange on Saturday,
Casio EXILIM Pro EX-F1. Shoots photos at 60FPS and it can record video up to 1200fps. Never tried one but tempted to get it to just mess about with slo-mo video.