Best of luck on your journey! I made the transition from Friendster to MySpace when a bunch of my top 10 Friendster friends were dead.

Anyhoo, this will be a tough climb for you. Ello captured a lot of what you are going for, at least for users who were willing to part with Google+. Vine still rules for short-form video, Dodgeball still wins for mobile-first, there's Meerkat and Justin.TV for streaming, SixDegrees is still at it, and (let's be honest) most of us are still on AIM. I hear good things about Path too, they have an inspiring CEO and a unique product. Niches are the future; there's even a startup trying to help Harvard nerds get laid. I wish you the best!

10/10. Would use this time machine.

Path was awesome!