I'm currently investigating SaaS solutions for implementing social network like activity on a client's site, such as activity feeds, message boards, leaderboards, add/delete friends/followers; things like that.
It would need to be able to integrate into the client's current CRM system (Salesforce) as well as their existing site; we don't want a separate site to send users to see their friends' activities and other things like that. Therefore, we need a solution with a robust API we can work with to integrate into our current site.
I've looked at Lithium and SocialEngine; but want to see if there are other options I might be missing.