Hello, very interested in helping you succeed with this project, feel free to view my profile for an overview of my experience, more than happy to go in to more detail of course. I'm also Freelancer.com's #1 preferred provider for assisted SEO/SEM projects here in Australia. Hope to talk soon =]
Thanks & Regards,
Mark.
P.S. I've already found two ways to get to airbnb's users, that was in the first few minutes =]
As for cash/equity, a bit of both would be ideal, happy to have a chat on skype...