For Explainstuff, I was using Amazing Grace from Vladimir Prevolac before. It is a very clean light weight, SEO oriented theme with no customization. The one I have right now (Atahualpa by BFA) has a web site look, but I feel is heavy weight either because I am using more plugins or because the theme itself has more options. Has anyone come across a free template that is light weight and has a website look,...I don't want a blog look.....should have three columns, and a few options..... If you have one in mind ...Just throw it at me. Thanks.
I was using Amazing Grace from Vladimir Prevolac before. It is a very clean light weight, SEO oriented theme with no customization. I like Vlad's stuff...it;s not the best in the world, but he keeps SEO in the front of his mind. Have you tried out Thesis or anything like that? It costs money but I hear it is pretty good. You could also have someone custom build you a theme for not that much.