EarthLink believes an open Internet is a good Internet. An open Internet means users have full end-to-end connectivity to say to each other whatever it is they say, be that voice, video, or other data exchanges, without the help of mediating servers in the middle whenever possible. We believe that if peer-to-peer flourishes, the Internet flourishes. SIPshare helps spread the word that SIP is more than a powerful voice over IP enabler --- much more. SIP is a protocol that enables peer-to-peer in a standards-based way.
Today phone numbers define two things: a routing method. and an identity. Let vCard/hCard + Synchronization and Bluetooth handle identity. Let SIP handle the routing.
To call me from France, my Grandmother has to look through a note book written in her handwriting she can barely read, and feel her way through a keypad to punch a bunch of numbers.
The most advanced home phones today are about the same. The almighty numeric keypad is prominent. Screens are tiny and unreadable. They barely interoperate, or synchronize with anything.
Handhelds have evolved more nicely.