I was bored, so i counted the portable devices I have which do other jobs but are technically also MP3 players and I was quite surprised:
Philips 20gb media/mass storage drive
Sony K750 phone
Portable DVD (unbranded ebay special)
TomTom Go (if you put the software on)
Compaq Ipaq 3700
iQube (okay, so this is just an mp3 player!)
So thats 8 but there might be a couple more, I haven't fully explored my Thermos flasks feature set yet. If I extended this to the non-portable stuff that's plugged in at home, there'd be a rediculous amount. It just seems to me that virtually every modern device has to be an MP3 player as well, it's bizarre!
So, the bidding starts at 8, do I hear 9..............