Microsoft SharedView Beta
If you haven't taken a look yet, Microsoft SharedView is a fast and easy way to share documents and screen views with small groups of friends or coworkers; anytime, anywhere, and what is most important, it is completely free. This version is available up to 15 people in different locations.
Although it is still in beta version, I have been using this product for a while to show the progress of my work to other off-site teams, and it works pretty well with a standard internet connection.
If you want to try it, it is available here.