For me, it's been a combination of craigslist and the network of people that I have worked with in the past. Having worked for 9 companies in the last 10 years

For me, it's been a combination of craigslist and the network of people that I have worked with in the past. Having worked for 9 companies in the last 10 years, I've found that it's more about who you know than what you know. And if you are well connected in the internet industry AND talented, startups will find you. Also, get your resume on the web and let the search engines index it. You'd be surprised at how many random searches will lead people to it.