We need to promote this site and get the word out to grow it, keep it interesting and make it more useful to the world. That is, of course, what SamTheBrand's been working on with the contests.
Another approach that Stack Exchange has used before is promoting sites at events.
This could simply be that one of us goes to an event, Stack Exchange sends you a package of promotional things (flyers, business cards, stickers, t-shirts, that sort of thing), you go, talk about how awesome our site is to random people, hand out the promotional things, and then later write up a short blog post about how awesome the event was.
If it's something where you could speak or otherwise be more involved in the event, they might sponsor you outright.
If it's in their budget, they might send some of their own staff. I'm hoping for Bubbles .
But we need to make suggestions for events that could make sense.
There don't seem to be a lot of conferences or tradeshows that would make sense, those seem to be advocacy-focused or limited just industry people. But big rides or races where a lot of people show up would be perfect.
I'll throw out a few suggestions, but other people should, too. And say whether or not it's something you'd be willing and able to attend yourself.