I’ve got lenses on some pretty narrow topics, but have managed to get three into the overall top 100 (and several more in their respective ‘topic’ top 100)... mmy topics are pretty narrow in focus and don’t attract too much traffic … but I have some more mainstream Lenses in mind that should feed the ‘niche’ ones…

Some of my lenses are:
http://www.squidoo.com/cybernetics Science of Management
http://www.squidoo.com/management_matters Pracitice of Management
http://www.squidoo.com/vsm Viable Systems Model
http://www.squidoo.com/dhcsoul Me, Myself, and I