Ask HN: Blekko - what happened on Day 0?

OK - so I have a relatively obscure website/blog. On a good day I have 10 or so weirdos lurking around it. And yet, it seems Blekko has included it in its crawl of the web. Clearly Blekko could not have 'bootstrapped' the google crawl index (for ex by getting results of N pages for queries) - so the question then, I wonder is how they started, on day 1 to build the index. And how did they get to my site (because clearly I did not submit it)? How would you go about building Google in your backyard?