I would wait to officially launch the site until you have more information and more designs on there. Otherwise you may turn people away because there's not much on there at the moment. I know it turns me off if I go to a website that isn't complete and I'm trying to get more information on them. I usually then move on to another website to find what I need. I would at least have a good starting gallery of pictures and information on prices, etc so that when people go to your site, they'll wanna stick with you :-)