There are many ways you can get a free Ipod or Iphone.  Most involve you signing up for programs that give you free trials then begin charging automatically if you do not cancel the program/product before the free trial ends.  These programs change and go away often.  I will try to keep this list as current as possible for stuff that looks promising.

Ipodfree.net – Free Ipod Nano.

GetFreeIpod.org – Another free nano.

Your-free-iphone.com – Free Iphone.  Complete an offer then Iphone.