PUBLIC MARKS from Spone with tag networking

E is a service that integrates all your existing social services into an E•ID, which you can share with anyone in the real world. To exchange E•ID's, you just need an internet-enabled mobile phone like an iPhone or Blackberry. When you exchange your E•ID's, E makes sure your contacts get added to your other social services like Netlog, Twitter, Last.fm, Soocial, automatically.