The domain with a keyword is more significant than VERY SMALL, as previously suggested. In addition to the positive rating a domain with the keyword gets in the search algorithm, it is also a part of content for every link on and to your site. It is not the "end all be all" for positive ranking but it can play an important role. Also if the keyword is in your domain name, it makes it more credible to searchers when they see the URL on the results page and more likely to click...And user clicks from search results pages IS A PRIMARY WEIGHTING FACTOR!!!! Good Luck.