I remember a Slashdot story mentioning that the Linux PDF viewer ignores the copyprotection. You might have to fiddle with it a bit b/c the story was about whether it was right to disable the copyprotection.
Personally, I hate PDF and wish someone would make a zipped html file the standard crossplatform doc format (include images and whatever in the zip, so you don't have files everywhere). Easy, effective, and very crossplatform. I suppose that's too simple for some people though.