That's actually much worse..as you really have to recognized for companies to want ad space..But the best way would be to add an Advertising section to your site (same way Anand does), and if companies are interested, they'll e-mail you and you can either host and control their ads yourself (hard to do and not worth the trouble for one or two companies) or have a third-party do it (i.e. Engage Media).
But this requires a whole lot more traffic to attract advertisers to do..even Anand is having trouble selling all his ad space (which is evident because you see the same Low Rate Loans ad on the forums way too often).
So yeah, not to really discourage you or anything, but these days it's really hard to make money off of internet advertising. Even the bigger companies are making about 10% (not 10% off but 10%) of what they made this time last year.