We started out with a wordpress template that we really liked and used it as a non-wordpress site. Over the past two years, As we've seen elements from other sites and templates that we liked we've integrated them when possible into our design. It's pretty much grown into it's own thing.

I think it should be noted tho that none of us here are web or graphic designers. We're all pretty much customer service savvy system administrators and technicians. We have yet to agree upon actually spending a couple grand to pay a designer to make a site. I think eventually that time will come when one of us finds someone that we all agree upon and then we will pay to have a custom site done.

One of the things I've learned is don't try to please everyone with the site design and layout and forget about what you and your team like.