RealDVD software has just been released yesterday. You can get a free 30 day download here. I've just downloaded it. The L.A. Times reports Hollywood studios are suing to stop it so you may want to grab it while you can. What it allows you to do is copy any dvd no matter what kind of overlay protection and save it to a hard drive. If you have an external hard drive, this opens up a free library possibility for you. Rent from netflicks, copy to hard drive, view anytime. Loan and load, etc.
I've just finished copying my dvd to my external drive, because sometimes I don't have a copy when I need to order copies. But I can see why the studios would be in a panic over this.