From the release:
ABC News, ABC News Now and C-SPAN will produce the AFSCME forum in Carson City, Nevada on February 21, 2007 at 3:00pm EST, moderated by George Stephanopoulos.
ABC News Now will offer it live via the pool switch feed in Washington, DC. C-SPAN will carry the forum live on cable nationwide.
Candidates confirmed to attend, as of publication, in order of appearance at the forum:
(as determined by lottery)
United States Senator Chris Dodd, D-CT
United States Senator Hillary Clinton, D-NY
Former Iowa Governor Tom Vilsack, D-IA
Former United States Senator John Edwards, D-NC
New Mexico Governor Bill Richardson, D-NM
United States Senator Joe Biden, D-DE
United States Congressman Dennis Kucinich, D-OH
Former United States Senator Mike Gravel, D-AK