Potterdammerung [Mega-Spoilers]
Don’t read this unless you’ve finished The Deathly Hallows, don’t care about spoilers, are or just a jerk who wants to find out what happens at the end and ruin it for everyone.
Sadly the funny parts are pretty much wall to wall spoilers, but once you’ve read the book, this is a must read. If you are not bothered by spoilers, while you CAN read it without spoiling the book, I don’t think it would be very funny on its own.
Update: Another summary of snark, albeit written straight rather than as parody.