When I was doing the beta testing for http://flockmetrics.com http://flockmetrics.com I was looking for people with SaaS startups and I ended up using a few dif

When I was doing the beta testing for http://flockmetrics.com http://flockmetrics.com I was looking for people with SaaS startups and I ended up using a few different approaches. I contacted people I knew personally that were involved in startups. I asked a friend who was involved in a startup incubator to email the incubator's founders mailing list asking for beta testers. I posted on the @flockmetrics Twitter feed and my own personal one. I posted the site on http://betalist.com http://betalist.com. I cold contacted some people I thought would especially find it useful. In the end I found it much easier to get feedback from those I had up front personal contact with.