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I noticed a lot of Japanese and Korean sites come up. Of course they didn't have the word "go" on the page (they are in foreign character sets). They had it only in their URL.
There was always speculation that keyword in URL helped because people would link to your site with the keyword in the anchor text, but that's the first hard evidence I've seen that keyword-in-url has a direct affect on ranking.
word1word2.com can be found for a search of word1word2 or +com (this is largely irrelevant to rankings as the URL weighting is tiny)
word1word2.com gets a boost for a search of word1word2 or +com if people link to the site using the domain name as anchor text (this is often quite relevant to peoples' rankings)
word1word2.com cannot be found for a search of word1 or word2 because of the domain name.
word1word2.com gets a boost for a search of word1word2 if people link to the site using the domain name's keywords as anchor text, but split up (this is often quite relevant to peoples' rankings)