You're thinking about the problem in far to conventional way - change the question - what you need is a number that friends, family, colleagues, business, etc can reach you. Your cell phone is just one of many systems designed to carry voice. A great example of reversing this problem is the former "Grand Central" now "Google Voice". (Note: I have it under good authority that if you are on the waiting list an additional one million new subscribers will be added as soon as July) There are dozens of other one number systems - Google Voice is just free. Now you have a single number of which your cell phone is just one of many ways to answer or place calls. PS - For those of you keeping up with the Skype/SIP discussion - Skype has agreed to begin providing interconnection to commercial SIP providers. They have been testing this for about a year and I can attest that the system works very good. I've been able to place calls to and from my Skype account from any phone including my Cell.

Well I'm glad that I'm not the only one that recognizes that John's a raving fool - why do we even care what he thinks?