We had the benefit of building products for a market that was highly active on Twitter. That and two popular HN posts bootstrapped both of my current company's products. I owe a ton to HN, but even more to Twitter.
Can you comment more on the sell process to individual users with HN and Twitter: did you find and go after people that tweeted or posted about related topics to your products, or look for people that might want your products, or did you let them come to you through your posts or tweets?