Update: From October through November 2011, I have been checking and changing my neighborhoods after running Mootilda's HoodChecker program. There were a few problems, so the file for Fixed_Maple Valley is new, the file for Clarkston University is exactly the same because HoodChecker said it was okay. If you have previously downloaded Maple Valley, and want to continue using the version you are playing, then you might want to run HoodChecker yourself, and follow the instructions in Mootilda's thread to fix the things it finds is wrong.
Thanks again to Mootilda!
On the 2nd of June 2005, a guy at TSR going by the username Zythe had the idea of creating a neighborhood that we'd make ourselves: with its own 'main' characters, and a storyline that you can follow and play out according to the clues lying around in their family descriptions, individual bio's, and by examining their relationship panels and memories. Or ignore all of that, do exactly as you like, and point them in your own direction!
To do this, there were things to learn and sort out inbetween, but on the 19th of September 2005 it was released. A year or so later, my own version of Maple Valley 'died', and I was completely sad! I had big plans for that hood, the whacky charactered and sillilly named sims wound their way into my heart. Even the ones I thought I'd dislike became important to me. You don't really need to know that, but it may explain my passion and love for this neighborhood. I was part of the team that had put it together, the team gradually left the Sims 2 community and I've 'faded out' of it as well, apart from uploading and updating my own neighborhoods.
My email address is included with the major downloads, I am always willing to try to help if you have any problems.