Kudos on pleasedress.me, good job on the press releases and traffic from that. I've had the same idea to do a portal site of t-shirts for a long time though haven't had the chance to do it yet. It looks great though.A classic concept is "you have to spend money to make money." If you spend enough money on advertising, and your product is good enough, you should see greater returns.
are there specific companys that work with ad's for blogs, or do you just go to the blog writers/owners?Blogads have worked well for me so far. Of course knowing your target market is key for any ad campaign to work. Figure out who specifically will want your product and then find a way to get it in front of them.