From SamChurchill's post to the MailingList.
General Organizations
Internet Professionals NW [http://www.ipn.org/]
Multimedia / Internet Developers Group [http://www.oregon.org/]
Oregon Creative Services Alliance [http://www.portlandcreates.org/]
Free Geek [http://www.freegeek.org/]
Hardware User Groups
Portland PC Users Group [http://www.ppcug.org/]
Vancouver PC Users' Group [http://www.vpcug.net/]
Portland Macintosh User Group [http://www.pmug.org/]
Software User Groups
Portland Linux/Unix Group (PLUG) [http://pdxLinux.org/]
Portland Java Users Group (PJUG) [http://www.pjug.org/]
Portland Perl Mongers [http://portland.pm.org/]
Portland Visual Basic User Group [http://www.pdxvbug.com/]
Portland Oregon Python Interest Group [http://groups.yahoo.com/group/porpig/]
Software Association of Oregon: [http://www.oregonworks.org/]
Open Software Development Lab [http://www.osdl.org/]
Portland Networking User Groups
Portland Area System Administrators' local group [http://pasa.portland.or.us/]
Portland Area Networking User Group [http://www.panug.org/]
Portland Home Networking User Group [http://homenetwork.n2k.net/]
- Portland FreeBSD Users Group [??]
The Portland (Oregon) Area .NET User Group [http://www.padnug.org/padnug/default.aspx]
Other User Groups
Society for Technical Communication [http://www.stcwvc.org/]
Computer-Human Interaction Forum of Oregon [http://www.chifoo.org/]
Portland Robotics [http://www.portlandrobotics.org/]
Science/Art Institutions
Oregon Museum of Science and Industry [http://www.omsi.edu/]
Portland Children's Museum [http://www.portlandcm2.org/index.htm]
Regional Arts Council [http://www.racc.org/]
PR and Publicity
Portland FM Radio Stations [http://100kwatts.tmi.net/fm/PDX.html]
Portland AM Radio Stations [http://100kwatts.tmi.net/am/PDX.html]
Portland TV Stations [http://100kwatts.tmi.net/am/PDX.html]
Portland Newspapers [http://www.orenews.com/cgi-bin/dbpages/showGMlinks.cgi]
KBOO Community Radio [http://www.kboo.org/]
Oregon Business Magazine [http://www.oregonbusiness.com/]
Portland Business Journal [http://portland.bizjournals.com/portland/]
Portland Tribune [http://www.portlandtribune.com/]
Oregonian [http://www.oregonlive.com/]
Public Relations
KVO [http://www.kvo.com/]
Wagner/Edstrom [http://www.wagged.com/]
McClenahan Bruer [http://www.mcbru.com/]