Such a cool idea!

A lifehacker article here on a system by GrandCentral which lets Americans register for a phone number and then have each call to that number redirect simultaneously to their other numbers. Even better, you can set groups and identities that mean that, say, if someone in your 'Friends' called, only your mobile rings. So cool! just imagine...in 10 years or so, Telstra may have implemented just a portion of this.

Vicki is also cool.
So is social badminton :)