Keyword research on the World's 2nd largest search engine is different than ranking on the big "G". If you can do both at once, YES, it takes work. You can easily get a storm of social bookmarking hits (reddit,stumble, etc.) but they are just hoping you are stupid so they can burn you. How do you drive MASSIVE traffic?
**Edit: More truth than ever. Do NOT waste your time on bogus "social bookmarking" links. Especially paid package deals.
**It is Bull**** unless you do it right. Not worth the time and effort.