Hrm, surprised nobody suggested Craigslist. I bootstrapped myself into a data scientist/consultant with gigs from Craigslist. (Well, grad school helps too, but the initial contract leads were pretty much all from CL.)
Hey, that's what I'm bootstraping myself into right now - I'm currently three months into my first data science consultancy job (more on the programming/infrastructure side of things - extracting/preparing data, launching large distributed jobs etc.). I'd be delighted to talk with someone who's been in this market longer than myself, but can't really contact you (no e-mail in the profile) - please give out your e-mail address (either in public or just e-mail me) if you'd like to talk.
Weird. For me it was literally like 10 out of 10 replies. Though I pretty much had it set to search for "data scraping", "data mining", "data science", "big data", "machine learning", and "data analytics", then have it forward gigs/jobs/etc. to me via RSS.