My biggest success so far has been from Ask.com. If you type in the name of the Nissan Campaign "7 days in a Nissan Sentra" my blog post appears first (see image)! I'm #4 if you search on "7 days in a sentra". You will also see a number of other blogs that come back in the search results.
Remember: Blogs do make a difference and are highly optimized for search engines so keep blogging and people will find you and listen!