I would add something that I guess is implicit in karolist's answer: I would not worry much about whether or not they are advertising a job. If they are, great!

I would add something that I guess is implicit in karolist's answer: I would not worry much about whether or not they are advertising a job. If they are, great! Apply for it. But if they aren't, poke around the company, find someone's e-mail address, and send them a CV and a letter which tells them that you understand specifically what they do and are interested in their company. 95% chance, they delete your e-mail without taking it seriously. But that's okay. (.95)^100 is small.