I recently grabbed a SanDisk Sansa Clip+ from amazon for under 50 bucks. I grabbed the 4 gig model but the cool thing is that it has a micro SD slot. So I can run a microSDHC card in there (what are they up to now like 32 gig) and have all kinds off flac goodness in something the size of a matchbook..
"The Sansa Clip+ MP3 player supports the most popular audio formats, including MP3, WMA, secure WMA, Audible, Ogg Vorbis, and FLAC."
The thing is friggin sweet menu is very nice if anyone has any questions hit me up.. It is rock solid!
Otherwise yeah I just use my iRivers either the H1xx or H3xx to play flac in the car..
Neil