I was finally able to upgrade to Google Earth Plus today (they had disabled the upgrades for a little while), so I've started building some extra 3D buildings. I started with my home town of <a href="http://www.googleearthhacks.com/forums/downloads.php?do=file&id=78">Marietta, GA</a>. I only did about 20 buildings or so, but it's enough that you can get an idea of what we can do with it.
If you have GE Plus, feel free to start "building" your town and then submit it to our file archive. Over time, as people build more and more small towns (and other people tweak them to make them better), this could turn into a noteworthy collection.