The mailing lists have been helpful for the occasional obscure problem that someone else has solved before you. Too many comments, should be able to send out a questions and get a single message with all responses shown.
Mailing list is great.
Web site is great when I remember to use it as a resource. Cross posts among campus e-mail lists is a minor annoyance. End up receiving some messages many times. The Web page has been very useful - good information, and simple navigation. I think both are good for providing information, updates, answers to questions.