Forno Bravo is an Italian manufacturer of wood-fired ovens. Their ovens are unique in that they are shipped as prefabricated segments which are then assembled by you on your site. They have a very strong reputation and their site is wonderful! If you would rather build a brick oven from scratch they even have a free eBook to walk you through the process! To receive the eBook you'll first have to register, then they'll send you a confirmation email with a link to your free download. I did this some time ago and can confirm that they do not SPAM your inbox following the registration.
They have an active forum, links, recipes, photos and lots more.
Here's a few links to my favorite things on their site: