I picked up one of these little Sansa Clip players at Wal Mart recently and have been delighted with its performance.
The 1MB unit only set me back around $30 and offers MP3, OGG, FLAC, secure WMA & Audible playback. In addition, it has a great FM tuner with 20 presets (I am a radio junkie) and a great sounding voice recorder with built-in mic. You can even record FM broadcasts!
The sound quality is excellent using the included headphones. It comes in fashion colors including black, pink, red, blue and silver. The internal rechargeable battery (which is charged using your USB port) is good for 15 hours of playback.
The clincher for me was that it has a setting so that it appears as a disk drive on your computer under any OS and does not require proprietary software. This was a "must have" since I use Linux most of the time on various computers.
If you are looking for a tiny clip-on player, this is the one to get!
www.sansa.com
