DRM nemesis DVD Jon (Jon Lech Johansen) has released doubleTwist, a user-friendly application that strips DRM from digital music files.
Read more about it at "doubleTwist Makes DRM-Stripping, Sharing Easy as Pie," "'DVD Jon' Frees Your Media with DoubleTwist," and "Free Your Media With DoubleTwist, a DRM Stripping App Anyone Can Use."