Something that you should also keep in mind is that your site's subject matter and ad placement of your site will also affect how many clicks you are getting per 1K of visits.
i think i gotta first be able to hit 1k visits a day actually ... lol. . is there a forum here with info on boosting traffic?
depends on what kind of site you have. Forums get less clicks.. other niche sites get around 50-150 clicks per 1000 uniques
i've managed to mantain a stable 2% CTR through my sites.. it's basically due to that they use all same ad positioning and layout...