iRiver unveiled the iRiver M20 Navigation PMP on their special CES 2008 'reveal a gadget' a day site.

The iRiver M20 seems to replace the iRiver NV navigation device iRiver introduced last Summer.
iRiver got rid of the big navigation wheel prominently featured in the NV. Details are very scarce on the iRiver M20 so far.

Besides navigation the M20 supports DMB TV, FM radio, video player and audio player and I guess the user interface works via touchscreen.
Via the iRiver site (Korean).

The iRiver NV ships in Korea and the iRiver M20 will also just be available in Korea when it will be released. iRiver has so far revealed the following gadgets at CES 2008:

• iRiver Homme
• iRiver P20
• iRiver LPlayer
• iRiver Volcano
• iRiver WING
• iRiver Unit2
• iRiver Spinn
• iRiver P10
• iRiver D30