Omar Shahine sent me a message inviting me to sign up for Live Contacts this evening. It's a service that ties together your Messenger address list, Hotmail/live mail contact lists, and MSN spaces profile info (all, of course, associated with your passport identity), and let's you subscribe to someone else's contact info. Once subscribed, any time someone on you Live Contacts list changes their contact info, it changes in your list. So, it's always connected and up to date.

Plus, you can choose how much of your personal and business contact info to share (granularly), and with whom to share it.

Start by logging into your Spaces profile (mine's here, not used much to date) and then you can share your contact info with others. Choose "Edit Profile" on your space page, and scroll down to the "Contact Information" section - that's where you can specify how and with whom to share your info. It'll always be up to date in other people's Messenger and Hotmail/Live Mail apps.