Like any good entrepreneur, I immediately did a vanity search to see how the Nelso sites ranked for common search terms like "Prague bars" or "Copenhagen hotels". I didn't expect to see Nelso.com at the top of the first page, but I was surprised to find that Blekko doesn't index any content from any of the Nelso sites.
From the article linked above:
We have a full Web crawl. Come to Blekko, type /date and you can see the sites going in in real time. Our whole crawl is about 3 billion pages. It's not as big as Google or Bing's index, but we biased it to what we think are the best pages.