Local and National Interior Design Chapters:

Oregon Chapter of IIDA (http://www.iida-or.org/)
National IIDA (http://www.iida.org)
Oregon Chapter of ASID (http://www.asidoregon.org/)
National ASID (http://www.asid.org/)
NWSID (http://www.nwsid.org/)
Oregon Chapter of NKAB (http://www.nkbaoregon.org/)
National NKBA (http://www.nkba.org)

Learn more about Oregon State Legislation:

Oregon Legislator page (http://www.leg.state.or.us/index.html)
See what other states are doing (http://www.dezignare.com/interior_designers/coalitions.html) 

Other Helpful Links:

Council for Interior Design Accreditation (formally FIDER)  (http://www.accredit-id.org/)
Interior Design Continuing Education Council (http://www.idcec.org/)
National Council for Interior Design Qualification (http://www.ncidq.org/)
NKBA Certification Exams (http://www.nkba.org/education_exams.aspx)
Journal of Interior Design (http://www.journalofinteriordesign.org)
American Institute of Architects (http://www.aia.org)