http://news.digitaltrends.com/news/story/15229/apple_files_microsoft-like_drm_system
How true is this?
As far as I'm aware, Jobs doesn't like the idea of DRM. So
implementing one would be crazy.
http://www.roughlydrafted.com/2007/12/22/the-new-apple-patent-wga-evil-or-iphone-knievel/
This one sounds more plausible... but I've lost track of my
sources... 