Open Source Wedding
I created this Rails wedding site for my personal use (yep, getting married Oct 2nd 2010)! Released under the GNU GPL.
At the time of this writing the project has news articles, events calendar with rsvp, paypal integrated donation meter, wedding party members, wedding stories, and static pages. If you fork the project and make it better, send me a push request. You can find the source at http://github.com/randomutterings/wedding

