These are some sites that I have visited.  Their listing here is not necessarily an endorsement,

but click and see for yourself if you find something of value.  This page was last updated on 3/1/08. Apologies for any links that are no longer in use.                                                                      ~Chris 

Portland Area Yoga Studios
http://www.holidaysyogacenter.com
http://www.jlyc.com

http://www.yogashalapdx.com/

http://www.amritasanctuary.com/

http://www.yogaheartsong.com/

http://cedarmiststudios.com/

Out-of-State Yoga Studios
http://www.kaliraytriyoga.com
http://www.movingintostillness.com

http://www.anusarayoga.com
http://www.santosha.com
http://www.power-yoga.com/
http://www.yogazone.com
http://www.hathayogacenter.com
http://www.judithlasater.com
http://www.ebmyoga.com/home.htm
http://www.viniyoga.com/  

http://www.heartofyoga.org

Eating

http://whfoods.org/

http://www.boloji.com/ayurveda/av002

Yoga clothing and tools
http://www.huggermugger.com
http://www.chakratees.com
http://www.mariewright.net
http://www.gaiam.com

http://www.yoga-insight.com/

http://www.joshawipes.com

Information and resources
http://www.freeyogabooks.com

http://www.himalayaninstitute.org
http://www.ascentmagazine.com
http://www.yrec.org 
http://www.yogasite.com
http://www.yogaville.org
http://www.judithlasater.com/writings/
http://www.myss.com
http://www.yoga-ventures.com