Very cool - a light weight way to share applications...brings me back to the NetMeeting days..
There is even integration with Word - could this be the way for academic papers to be written, such that they aren't being emailed back and forth all the time.
If a Microsoft Office Word document is being edited during a SharedView session, the Track Changes feature in Word is automatically enabled, and each change is highlighted with a text identifier indicating which user made the change.
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.
Source: Microsoft SharedView Beta