With the Reader plugin, can you see an unread post count on the sites that you are following?

We want to use the Reader plugin for our teachers to quickly access their student's blogs and comment on them. However we also want them to be able to quickly see if the student has posted anything since their last visit - an unread post count if you will. However the plugin doesn't seem to show that - is there anyway to work around that, or any chance it is a feature that could be added?