Thanks Kurt,
I will check out nichebot.com.

So are your dozens of long tail good keywords all derived from the same root keyword on a specific topic? or do they across different topics?

Do you have an post where you give example of how to create a content based site with the long tailed keywords? I understand how to integrate fatbomb to create search box now, but I still don't quite get how you create content site with the scripts and make the site more white hat like site instead of a collection of good-keyword pages.

Thanks!
Roze