New Jersey Poly and Bi groups -- NJ BiZone 
www.BiZone.org

Gay/Lesbian/Bi/Transgender polyamory discussion/support/networking list for the New York area.
http://www.poly-nyc.com

Delaware Valley Synergy (DVS) Philadelphia area social club supporting open relationships.1220 Valley Forge Rd., PO Box #911-69
Valley Forge, PA. 19482 phone 610-948-5068 www.dvsynergy.org or for more info, email: info@dvsynergy.org

Family Tree, Boston, Massachusetts. Contact Family Tree, 9 South Main St., Randolph, MA 02368.

Poly-Boston is a mailing list and group for poly, poly-curious, and poly-friendly people in the general vicinity of Boston, Massachusetts, USA. It is primarily for announcements of interest to that community. 

Chesapeake Polyamory Network DC, Baltimore, central Mid-Atlantic area
Poly support and social group sponsors social events, discussion groups, in a supportive environment.
Also an email list. For more info, write to ChesPoly@aol.com.

Hampton Roads Polyamory (Ha.R.P.)
Monthly meetings in the Hampton Roads & Norfolk, Virginia area, and email list. Also connection for fledgling Richmond group. For more information email partyof3@HRPolyamory.com or visit our web site at: http//www.hrpolyamory.com

Three Rivers Polyamory Network
Pittsburgh, PA area polyamory/polyfidelity group just starting out, but more information should be added to the web page soon, and we hope to have our first gathering in January. For information contact 3rivpoly@geocities.com mail list for events announcements.

Polyamory Network of North Carolina
Triangle Polyamory Network (Chapel Hill, Raleigh, Durham), North Carolina contact TriPoly_net@hotmail.com
Also NC Poly Mailing List and Poly SE Mailing List

Poly 
Poly is a high-volume, friendly mailing list for polyamorous folks of all types. Poly has members from all over the US and some other countries. To subscribe, send email to listserv@polyamory.org with the following message body: subscribe poly {your name}

Lovelist
High-volume email discussion list from Loving More. Subscribe from www.lovemore.com.

ATMP-talk 
Mailing list of the Alternatives to Marriage Project . 
ATMP is a national organization offering support, advocacy, and resources to people who choose not to marry, are unable to marry, or are in the process of deciding whether marriage is for them."   Alternatives to Marriage Project, PO Box 991010, Boston, MA  02199  ph (781) 793-0296   fax (781) 394-6625 http//www.unmarried.org or email to atmp@unmarried.org

PALs (Parents with Alternative Lifestyles) 
Mailing list for discussion of attachment parenting. Open to those supportive of polyamory, same-gender couples, bdsm, alternative religions, and anyone else who finds themselves to be defined as belonging to an "alternative" group. To subscribe send mail to PALs-request@subtle.vna1.com with the word SUBSCRIBE in the text. (Note: The address contains a number 1, not a letter l.) 

BiRequest welcomes people at all stages of The Journey, from those newly aware that they are "different" all the way to those with experience and confidence in their alternative sexualities. BiRequest offers a non-judgmental environment respectful of each person's unique circumstances.

 Our meetings are moderated and focused on a discussion topic but not limited to that week's topic. After each discussion group session, we go to dinner at a nearby, reasonably-priced restaurant for socializing and more informal discussion. 

BiRequest meets from 6:00pm to 8:00pm on the 1st and 3rd Thursdays of every month at Identity House, 39 West 14th Street, 2nd floor. See our website for information on joining the BiRequest online mailing list.

E-mail: birequest@yahoo.com 

Website: http://www.birequest.org/

BiZone (formerly "The Bisexual Network of New Jersey") 
is a member-based organization created to foster a visible community for bisexual, bi-curious, bi-friendly people, their partners, and allies. We support the community through regular social events, support groups, and education. 
Information line (732) 246-3769
http://www.bizone.org/