It took awhile, but support for the SAP NetWeaver portal is available for ESS, MSS and HR Professional Roles as of Service Pack 19 to Enhancment Pack 6 for SAP ERP HCM.
Here are the links to information for Employee Self-Service, Manager Self-Service and the HR Professional Role (Personnel Admin and Organization Management) :
Here's a screen shot of this information for the HR Professonal role:
