Would you like to design an ad for this site? We're seriously considering posting one on one or more of the periodicals that people who come here read (feel free to add to that list). Please post ideas for ad concepts and/or pictures of actual ad designs as answers.
The ad should definitely contain a URL that gets you to this site. http://judaism.stackexchange.com is the obvious choice. http://mi.yodeya.com also points here and is an unofficial alternate URL.
Here are a couple of previous meta questions that could help give you ideas about what to express in an ad: