Suedom

Suedom is a long-running, popular series written by former PPC boarders Andy and Saphie, and hosted on Miss Cam's website. It explores how the characters of Middle-earth would realistically react to the notion of Mary Sues invading their beloved world. Despite a high chapter count, it remains unfinished.

Plot Summary
From Suedom's website:

A mysterious object, known only as the "Bridge," is taking bad Lord of the Rings fanfic, particularly Mary-Sues, off of the internet and affecting Middle-Earth's reality.

Middle-Earth is in pieces! Chaos reigns!

Enter Kate and Kira, two internet buddies who get sucked into Middle-Earth as unwilling Mary-Sues. Their only wish: To get the hell home. But they can't do that yet, because they're not the only ones being pulled into Middle-Earth as Mary-Sues. Other random girls are being turned into the perfect, big-breasted, tiny-waisted female characters, and being brainwashed to think they are those characters. The Bridge is pulling them in.

Enter the PPC. The Protectors of the Plot Continuum patrol Middle-earth in disguise, killing the 'Sues and protecting the Canon. They're the good guys (sort of.) What they don't know is that they're killing innocent people, brainwashed and trapped in the 'Sues' bodies.

Now Kate and Kira, the only Sues strong enough to resist the will of the Authors, are Middle-Earth's last hope. With the help of Gimli and Èowyn (the only characters that can resist the Mary Sues' mind-numbing influence), and guided (often into ditches and off cliffs) by the tortured, semi-evil writer of the very first Mary-Sue (who, incidentally, is trapped in the form of an urple dragon), the girls must find the Bridge and destroy it.

All while avoiding being snogged to death by lovesick characters, saving other Mary-Sues, fighting other Mary-Sues who want to stay 'Sued, and surviving random encounters with the recruits of the PPC.

And of course, while avoiding the most deadly assassins of all, Jay and Acacia themselves. Can they save the Canon, or are they target practice?

Cameos
Suedom featured cameos from many BNFs in the Canon Protection Initiative, including Acacia Byrd, Jay Thorntree, Greyladybast, and several members of OFUM and HFA.

Links
Suedom can be found here or here. (Please note that there is a chapter discrepancy in the two links, starting with Chapter 20.)