Can I use a new ipod nano with Windows Media Player?
No. Apple only allows their mp3 format to be played on your iPod. However, if you have some non-licensed music from Windows Media Player that you would like to copy into your iTunes library, you will be able to add that to your library. But remember, it can not be a licensed format other than one accepted by iPod (such as licensed to Windows Movie Maker, Real One, etc.). Good luck and happy listening!