i wanted a wall charger for my zune since i ended up watching a few movies and the battery will die after like little over 3 hours, between 3-4 it stopped.
so i went to my local walmart, they had the zune ac adapter for like $20, then i was looking around for a skin and i saw
this i picked it up for $15 i was like sweet i can charger my zune while i watch movies and maybe even another mp3 player i own.
i used it, it works great for my zune, however i think it fried my creative zen stone. its designed for ipod&zune also other mp3 and usb based products such as that... but im not sure what caused my stone to break... i just thought i would point out the coincidence. so, stick with it if you have both ipod & a zune if you need to charge both through a wall outlet.
another product very similar is
this