[Capt.ArD]

I have to agree, some of the best-looking sites are the simplest. Basically, if you want to make a really cool website with some extreme graphics, don't overdo it. Pick a theme, say, WATER! For your banner, you might make the text blue and have a shiney quality to it. or make the side buttons be little water droplets with text next to them. just be careful to make everything readable and un-cluttered.

About banners, i guess i don't know what you want with premde ones, they would be other people's work. Just make you're own. Simple enough, if you can use the text and paintbrush features in PS. Or, be a real American and delegate the job to someone else. Get one of your team's animators to design one, render it, and save as a jpeg.

remember, FIRST is a learning experience. Look at other team's websites, and get ideas. learn from your peers.