Zune offers 2 million songs through its store. Apples i-Tunes has more than 75% market share. But both Apple and Microsoft offer their songs in propritary standard, which can be used only with their players. That is if you buy from Microsoft it wont play on the I-pod, and if you buy from Apple store it won't play on Zune. Crazyly incompatible. Shouldn't be that way.
e-Music a online store which has 10% market share sells music in MP3 format which is not restrictive like the DRM ( Digital Rights management). But then the music can be copied. Until there is a solution so that any body can buy from any store and also there is no piracy the consumers are is a soup.
Well hope standards emerge soon.