Brim, I'll handle this question... We chose vBulletin because of how robust and proven it is. Major corporations and other large forums use vBulletin for this very reason. Also, it is an extremely secure package. As for phpBB, take a look at the 'security vulnerability' list on many security sites and you'll quickly realize that phpBB is the PHP application with the most security issues and one that is broken into most often. Don't get me wrong, I'm a huge proponent of Open Source software and all. But when it comes time for me and the rest of the Tech Committee to install something, we need to make sure that the following things are taken into consideration: 1- Will everyone's information be secure? 2- Will the software be able to scale with the large increase of use we are season year after year? 3- Can we count on the forums being up at 3am? 4- Does it offer a robust set of features enabling the team to moderated posts, handle issues, and track problems? 5- Is the application a burden to run by a small team of volunteers. As such, we went with vBulletin. It meets all our needs and comes with support. Hope this answers your question.