CNet published an interesting interview with Chuck Westfall, technical adviser for Canon's professional products marketing division. They discuss why OLEDs aren't available in any Canon product yet.

Chuck says that OLEDs indeed offer high-quality images and lower power consumption, but Canon does not want to rely on other companies manufacturing ability. They are making around 30M cameras (compact and SLRs) each year - so they need quite a bit of capacity...

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters