Stack Exchange has a budget for holding site promotional events, whether it's a sponsorship on a related site/with a related business, contests for users of the site or just about anything else that fits within a vaguely reasonable budget.
I think we should come up with some ideas to propose to get some more exposure. Since it's September and the college students are back in attendance, grabbing some of that attention could be great.
If you have an idea, flesh it out as much as you can and post it as an answer.