Keep in mind that the Dmoz idea was just something I invented on the spot and may or may not be at all useful. An old bookmark I have is this from a few years back:<p><a href="http://seoblackhat.com/2007/02/21/online-business-niches/" rel="nofollow">http://seoblackhat.com/2007/02/21/online-business-niches/</a><p>However, they're hardly niches and would be thoroughly dominated by MFA stuff already with little room to drive in a wedge. You could however pick a few of those, do keyword research on each and then pick a three-word keyphrase from that wider list to think about and focus on? I wouldn't bother going after a single keyword or even two-word phrase as the competition will be too fierce.<p>Happy to trade emails if you want to bounce any ideas off me. Can't promise anything useful or insightful, but hey, it's free to try! My background is 12+ years web development (backend and frontend) with side projects in forum/community, some passive content sites geared around AdSense plus bigger ideas that I struggle to find time to work on.