At this time, our advertising is being handled by Hiveworks. You can find out more about how to advertise with us at the Hiveworks web site!
Girl Genius Online is a great place to advertise if you have a product that ties in with: Steampunk, Games (especially RPGs and Video Games), Science-Fiction or Fantasy, Girls' Interests, Science, Anime, Fandom, Conventions, Books, Higher Education, Cosplay, Gadgets, Electronics, or Comics.
We do screen our advertising, and we won't run anything likely to get us cranky e-mails, or anything that we find personally repugnant. We reserve the right to refuse any ad for any reason. (If we're going to get cranky e-mails, it's going to be for something WE did.)
Advertising on our other sites through Project Wonderful:
What's New with Phil & Dixie is the page where we post Phil's RPG comics which ran in Dragon magazine in the early 80's.
Buck Godot: zap gun for hire features the adventures of Phil's science fiction detective who is "always available, never free."