Here’s a quick niche research tip. Head over to http://www.nsspy.org. NSSPY stands for Name Server Spy. At their site you can check on all (well, almost all) new domain registrations. I like to check on the domains registered through Hostgator because many Internet Marketers use their hosting service: http://www.nsspy.org/archive/hostgator.com/

This should give you a few ideas