I am signed up to receive the Plumtree Developer Newsletter every month via e-mail. This has helped me stay up on things without having to hit their portal too often.
In the July newsletter they announced that they've got RSS feeds for the Developer Center. Cool beans! Here is the list they have available.
IMPORTANT: Your RSS Reader will display a list of items even if you are not logged in to the portal, but you must be logged in to view a selected item.