This has been linked from a number of places, including Boing Boing, but it's worth another link.
It's a brilliant series of notes discussing issues of online gaming and its allegories to the real world. It's great on so many levels.
Literarily, the topics are interesting and the writing is great.
Technologically, the layout of the work is awesome. It works like a series of note cards. Each card allows for user comments on the side. What a great way to interface your writing to the world. All that's missing are hyperlinks to similar works elsewhere.
And conceptually, using this site either for gathering more material, feeling out the issues with others, or just as advanced marketing, it works.