That there is no left wing/liberal counterpart to CPAC is damned significant

[DonViejo]

5. Americans for Democratic Action don't count any longer?...

They were a pretty big deal in the 60's and early 70's. Don't remember hearing anything about them in recent years though

Americans for Democratic Action (ADA) is an American political organization advocating progressive policies. ADA works for social and economic justice through lobbying, grassroots organizing, research and supporting progressive candidates.

History The ADA grew out of a predecessor group, the Union for Democratic Action (UDA). The UDA was formed by former members of the Socialist Party of America and Committee to Defend America by Aiding the Allies as well as labor union leaders, liberal politicians, theologians, and others who were opposed to the pacifism adopted by most left-wing political organizations in the late 1930s and early 1940s.[1][2] It supported a strongly interventionist, internationalist foreign policy and a pro-union, liberal domestic policy. It was strongly anti-communist as well.[2][3] It undertook a major effort to support left-wing Democratic members of Congress in 1946, but this effort was an overwhelming failure.[3][4][5]

James Isaac Loeb (later an ambassador and diplomat in the John F. Kennedy administration), the UDA's executive director, advocated disbanding the UDA and forming a new, more broadly-based, mass-membership organization.[6][7] The ADA was formed on January 4, 1947, and the UDA shuttered.[4][7][8]

Founding members included:

Reinhold Niebuhr
Hubert Humphrey
John Kenneth Galbraith
Joseph P. Lash
Walter Reuther
Eleanor Roosevelt
Arthur Schlesinger, Jr.
Wilson W. Wyatt
Over its 60-year history, ADA played a role in many major American movements—civil rights, women's rights, opposition to the Vietnam and Iraq wars—while supporting legislation that resulted from these movements.

http://en.wikipedia.org/wiki/Americans_for_Democratic_Action

And while I'm thinking about it, what about Move-on.org?