Microsoft SharedView, while not technically a Windows Live program, is available on www.get.live.com under “more betas”, and it seems to be falling in the cracks between Office and Windows Live.
SharedView allows you to collaborate on documents etc with up to 15 people in real time, while communicating together using, among others, Windows Live Messenger.
Hold more effective meetings and conference calls
Connect with up to 15 people in different locations and get your point across by showing them what’s on your screen.
Work together in real time
Share, review, and update documents with multiple people in real time.
Use when and where you want
SharedView is easy to use, from anywhere, at a moment’s notice.
New in Beta 2!
Now even easier to use, with improvements to the sign-in and join experience, group chat to send messages to others in the session, and performance improvements!