The offers, requests and exchanges in a Community Weaver 2.0 site are considered private. Therefore the RSS feeds are behind the CW login. You have to be logged into the site with the right level of access to see them. Google Reader and many others RSS readers do not support private RSS feeds.
At the bottom of the "View Offers" and "View Requests" you can also click on the RSS icon to see the most recent offers or requests.