With the 4GB/8GB versions of this recently getting posts I thought I'd point out that the 16GB version has dropped in price at Amazon.
I own one of these so if you have any question please fire away.
* 16GB - up to 8000 songs
* Battery life: 25 hours of Audio playback or 5 hours of Video playback
* SD Card (SD and SDHC) slot for memory upgrades
* AAC (.M4A) support along with MP3, WMA, WAVE and Audible
* WMV and DivX/XviD support (320x240)
* 2.5" Colour LCD screen
* FM Radio and Microphone
* 16.7m Colour Photo Viewer