Facebook co-founder and former Obama Social Media guru Chris Hughes has just launchedJumo, a social network for social activism, in beta today.  Jumo aims to help you discover what causes matter to you by allowing you

There seems to be a common cycle for many startups. First, you capture users. Then, you capture brands/celebrities. Then you capture revenues. Most startups never make it past step one, let alone steps two and three. The mobile photo sharing service Instagram rocketed past step one in about a week. And then