U.S.A.
Get flash to fully experience Pearltrees
https://privit.us/
Privit.us is currently in beta while we work on ensuring stability (and Diaspora itself is in alpha) so no guarantees are made about data loss, uptime, or anything else. (We'll do our best though!)
registration is open. ...but i am just one guy with a server, and i make no guarantees about anything -- i will do what i can to keep things working and updated.
https://failure.net/
Diaspora lets you sort your connections into groups called aspects. Unique to Diaspora, aspects ensure that your photos, stories and jokes are shared only with the people you intend. Ownership
https://diasp.org/