Another project we finished a few weeks ago was a site called Car Sages. A car questions and answers community. It was an experiment to see how long it would take to build a site with user registration, question asking and answering and other nifty features like AJAX search and autocomplete.
Well it took 2 days - roughly 18 hours. Thanks to CodeIgniter. The site is far from complete, but it goes to show what you can do when you have a spare weekend and not a lot else to do. :-)
