It’s Suprglu with social networking added on.

I had all sort of problems registering (and I’m pretty good at registering for new services). Ziki requires too much personal information, such as my birthdate. Also, I repeatedly got errors trying to submit my registration, and never received my confirmation email allowing me to log in. My recommendation: ease up on the required personal information, fix the web form and email confirmation, and slowly encourage your customers to add more content to the site. More on Ziki here.