When I have more time, I'm going to expand on this post.
But right now I'd like to link to a fascinating web site I just found by a guy named Matthew Delman. It's a wonderful web site, and even though I've only glanced at it, Mr. Delman looks like he knows what he's doing.
You can get there from here, to read about book pirates and DRM. It looks like there's a lot more to read as well.