[Jc.]

Possibly a stupid question, but do flash players use compact flash cards that can be easily switched?

 

[Idiot MD]

I haven't seen any that have an expansion bay for a compact flash card yet, but the Rio Chiba/Cali/Sports have an expansion slot for SD media cards. Also, the Creative Muvo2 has an internal hard drive that can be replaced with some Compact Flash cards, but I don't think "easily switched" would properly describe the process. You might also look at some PDA's. Most of them are compatible with CF's and some of them support audio playback.