I wanted to highlight a customer called Amos Hutchison and Associates. They used Tourneytopia to promote their firm and connect with existing and new clients by running a March Madness contest - http://www.tourneytopia.com/MarchMadness/ahacpas/Default.aspx.
They did a very nice job of branding their site and gave a way great prizes as well.
It is fun to see customers use the system like this. It is exactly what we had in mind when built the site.