Websites:

Metacognition and Memory Lab (Janet Metcalfe)
Metacognition and Education Lab (John Dunlosky)
Memory and Cognition Lab: (Marcia Johnson)

Talks in conferences:

Asher Koriat: http://vimeo.com/105952464
Janet Metcalfe: http://vimeo.com/105952466
Bennet L. Schwartz: http://vimeo.com/105952465

Recent metacognition conferences:

http://metacog2014.lapsco.fr/

http://www.metacognition2014.org/

Classic papers on Metacognition:

Nelson & Narens, 1994