Alongside the rankings (Speed, Trust, Reliability, Privacy) there should be user ranking/rating. For me, curation is the biggest problem (yes, there are hundreds of startups attacking collaboration, but which is the best for my need?)
Will add that later this week, see my other comments below. I intentionally want to keep reviews out for now though, since from talking to people it's become apparent that most people find reviews by strangers somewhat useless and would prefer recommendations from people they know & who understand them.
