Not a direct mentorship per se, but definitely check out Mike Taber and Rob Walling's "Startups for the Rest of Us" podcast series: http://www.startupsforthere

Not a direct mentorship per se, but definitely check out Mike Taber and Rob Walling's "Startups for the Rest of Us" podcast series: http://www.startupsfortherestofus.com/ http://www.startupsfortherestofus.com/ They also have a "Micropreneur Academy" which may interest you. Its basically a more detailed version of their podcast, giving tutorials/screencasts/forums detailing all the stuff you are asking about (niche markets, keyword research, conversion testing, mailing lists, adwords, etc etc) *For the record, I'm not affiliated with Mike and Rob - I just really like their advice and style. :)