From the site:
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.
No built in chat or audio with the product at this point. You can find out more in the FAQs. It does allow one to post handouts for a session, which are cleaned up when the session is over.