Insight Meditation Society http://www.dharma.org/ims/index.php 
1230 Pleasant Street, Barre, MA 01005
Two of the Guiding Teachers are Sharon Salzberg and Joseph Goldstein, who — together with Jack Kornfield — established IMS over 30 years ago.
Audio http://www.dharma.org/ims/mr_audio.html  (with links to other audio sources)
Teachers http://www.dharma.org/ims/teachers.php

Barre Center for Buddhist Studies http://www.dharma.org/bcbs/index.htm
149 Lockwood Road, Barre, MA 01005
The center’s purpose is to encourage the integration of study and practice, and to investigate the relationship between scholarly understanding and meditative insight. It encourages engagement with the tradition in a spirit of genuine inquiry. Located on 90 acres of wooded land in rural, central Massachusetts, just a half mile from the Insight Meditation Society (IMS), BCBS provides a peaceful and contemplative setting for the investigation of the Buddha’s teachings. Full teaching programme with many visiting faculty.

Spirit Rock Meditation Center http://www.spiritrock.org/
P.O. Box 909, Woodacre, CA 94973
Spirit Rock retreats are taught by the twenty one members of the Spirit Rock Teachers Council and by visiting teachers from other vipassana centers such as Insight Meditation Society (IMS)and Gaia House. Spirit Rock's teachers have generally practiced insight meditation for over twenty years. Many have trained in the monasteries of Asia. Over the years, they have each been invited into a formal teacher training group by the most senior teachers based on their depth of practice, maturity of understanding and compassionate heart.
Teachers http://www.spiritrock.org/display.asp?pageid=18&catid=4&scatid=8
Visiting Teachers http://www.spiritrock.org/display.asp?pageid=77&catid=4&scatid=9

Dharma Stream (web site) http://www.dharmastream.org/subindex.html
The above is a branch of http://www.dharmaseed.org/

Insight Meditation Centre http://www.insightmeditationcenter.org /
1205 Hopkins Avenue, Redwood City, California 94062
Insight Meditation Center began in 1986 as a small group meditating together once a week. Today, hundreds of people participate in events at our center throughout the week. Our talks are shared with a world-wide audience through our online Audio Dharma program. We also currently offer residential retreats in rented facilities. Guiding teacher Gil Fronsdal.
Audio http://www.audiodharma.org/

Seattle Insight Meditation Society http://www.seattleinsight.org/
We offer many dharma resources to the internet sangha. On this site you will find schedules for SIMS-sponsored events and classes, audio streams of classes and talks, sangha discussion forums, a library of online and hard-copy study materials and opportunities to connect with our community. Guiding Teacher = Rodney Smith
Audio http://www.seattleinsight.org/teachertalks.aspx?id=1  (Rodney)
Audio http://www.seattleinsight.org/guesttalks.aspx  (Guests)
Teachers http://www.seattleinsight.org/guestteachers.aspx

Insight Meditation Community of Washington http://www.imcw.org/index.php
P.O. Box 212, Garrett Park, MD 20896
In addition to founder and senior resident teacher, Tara Brach, IMCW is guided by a Board of Directors, Teacher's Council and several non-residential Vipassana teachers including Jack Kornfield, James Baraz, Carol Wilson, Sharon Salzberg and Joseph Goldstein. Over two dozen Kalyana Mitta groups of "spiritual friends" continue to support individual practice.
Audio http://www.imcw.org/audio/audio.php
Teachers http://www.imcw.org/getall.php?cid=7&scid=9

Insight Meditation Community of San Francisco http://www.sfinsight.org/index.html
Guiding teacher Eugene Cash
Audio http://www.sfinsight.org/talks.html

Bhavana Society http://www.bhavanasociety.org/
The Bhavana Society was created to preserve the Theravada forest meditation tradition within the context of Western culture.
Rte. 1, Box 218-3, Back Creek Road, High View, WV 26808 USA
Guiding teacher Bhante Henepola Gunaratana
Audio http://www.bhavanasociety.org/list/category/MP3s/