skrenta - 6:32 pm on Jan 6, 2011 (gmt 0)
blekko strictly honors robots.txt. We do not crawl webmasterworld.com, as evidenced by the lack of a cached page in our serps.
Like Google and Bing, however, we still include serps for sites which we can't crawl if we have enough inbound anchortext material. Snippets can be obtained from anchortext, dmoz or other metadata without crawling the site.