People already segment their lives with various communications. For example, people I talk to on a regular basis have my mobile #, tons of people have my e-mail address(es), people I choose to talk to a bit less have my home office #, very few have my Skype ID, very few have my IM handle, and basically just family members have my home #. Among all of these, my mobile # is most sacred and then my home #. If someone has my mobile #, they can cause my phone to ring or vibrate anytime they want. (Do you ever notice when someone asks for your mobile # you kind of internally hesitate?) They can also send an SMS whenver they want. With my home #, people can cause that to ring whenever they want, and even figure out where I live. There should easily be a number I create that in essence is a proxy to all my #s. A number I can turn on and off, open or close, or easily get rid of. A number I can fill in on forms (like mortgage docs!), put in ads, give to dates or people I meet for the first time, or simply to people I don't want to have ultimate access to me at all times. I want...privacy and anonymity like I have with a chat handle or e-mail address-something phone communications lacks today.