There are some rumors that Microsoft are working on a new Zune player, and they'll release it in early 2011. That's about all we know... If true, it's likely to use an OLED: the Zune-HD has one, and they might be using software similar to the WP7 - which is actually designed to be used on OLED display.

Zune HDZune HD

The Zune HD has a 3.3" 16:9 480x272 multi-touch OLED, HD radio and video (720p) and Wi-Fi. It costs $350 for 64GB, 215$ 32Gb and 157$ for the 16Gb.

Kyulux - Hyperfluoresence OLED emittersKyulux - Hyperfluoresence OLED emitters