I think that the community sense of humor I have observed here on the boards has a feel that is close to the show, so I'm not surprised that you like it. I bet that if a few of us got together that we could pull off a nice sit-com.
The NBC web site for the show is pretty good, and with the whole "Dundler-Mifflin Infinity" thing (fourth season, so you may not know what it is - just wait), they do a pretty good job of mimicing what the real D-M site would look like, I'm guessing.
I remember seeing a Pizza by Alfredo web site that was also fake, referring to some of the characters.
And Dwight's blog, Schrute Space, is good for an occasional laugh.
