Asono Mica Necklace MP3 Player
Yes, its strange looking. Is it practical? Sure if you want an MP3 player with built in headphones (adapter available to use your own). This strange looking MP3 player by Asono will get you about 12 hours of play back and one unsatisfied mugger due to misleading iPod like white headphones (other colors available). The Mica is available in 512MB and 1GB versions, and starts at about $150.
Product page here.