While checking my feeds this morning, I saw this special deal on the Rave MP Sport AMP256 flash-based music player. It's a refurbished unit, but with coupon it's only $40. In contract, I picked up my device from Costco in January for $80 and thought I got a really good deal. Since I got mine, I've been using it a lot for listening on podcasts and recorded conference sessions during my evening walks. It's got 256MB of memory built in, and it also has an internal SD card slot to add more storage if needed. The player shows up as an external drive when you plug it into your computer, so you can also use it to move around files. It runs off a single AAA battery, and I've usually had a single battery last for about 15 hours of playback. The file formats supported are MP3 and WMA (no Ogg Vorbis or AAC, alas). It also has a voice recorder and a FM radio; I've used the radio occasionally to check up on KUT, but I've not had a chance to do any recording to see how it sounds.
The unit has been a little quirky, but there's a new firmware update that looks to fix most of the annoying bugs. I'm really excited that it now has a resume feature which will let me pick up a podcast at the point where I turned the unit off.
If you're looking for a lightweight music player to use while you're running around, and you don't don't mind doing format conversion when copying over your AAC or Ogg Vorbis music, this player is worth checking out, especially at this really low price.