I've started using
NetNewsWire for reading my students blogs. I've only just begun, but so far I really like it. I like the way I can organize feeds in the sidebar and color code entries that have been read. It also color codes those blogs that have been recently updated or not updated over a certain period of time. Another nice feature is that you can view and edit the web blog page right in the NetNewsWire application window, in fact, I'm typing this there now. You are also able to have multiple blog windows open which are contained in a list on the right side of the window. I'll keep you posted as to if I continue to like using it. Attached is a picture of how it looks.
.