Yeah, may sound as a stupid thing but for some sites i created i got lot of visitors from Wikipedia.

Wikipedia doesn't allow advertising. However, if your website just launched relies over a very new market, and if offers very good/quality content, not found on other sites... You can have a chance so your link could reside into External Links section of an article related to that new market (new technology, aso).

Would help also if you are able to actually write article content, not just add links to existing articles.