Samsung MBP200

The MBP200 can connect to an external player (like a phone), but also includes a microSD slot. It also has a small 2.2" QVGA LCD (320x240), and weights only 140g.
Samsung MBP200
The MBP200 is now available, only in Korea, for around 300$.It can also be bought in Amazon.com, and shipped in the US through Korea, for 540$.