This of course doesn't mean libraries will never face another copyright-related threat, but it does prevent things from getting ludicriously horrible right now. If you're interested in following copyright and intellectual property news, I highly recommend the Copyfight blog, written by Alan Wexelblat.
And speaking of copyright, this decision also reminded me that I never posted a link to this great Copyright Guide from Cornell. It's a handy little quick-reference to figure out if something is or is not covered by copyright. Thanks Jason, and I'm sorry for taking so long to post it.
And finally, one of my pet-peeves: remember world, the past-tense of copyright is "copyrighted," not "copywritten."