Several new posts about capital, surplus value and accumulation posted by INIP, the publishing entity I work with that has the purpose of popularizing proletarian theory:

A brief definition of proletarian revolution (by Jan Makandal):
http://koleksyon-inip.org/a-brief-definition-of-proletarian-revolution/

A historical materialist definition of capital:
http://koleksyon-inip.org/a-historical-materialist-definition-of-capital/

A synopsis of accumulation:
http://koleksyon-inip.org/a-synopsis-of-accumulation/

On value (by Kiki Makandal):
http://koleksyon-inip.org/on-value/

A brief discussion of the origin of surplus value:
http://koleksyon-inip.org/a-brief-discussion-of-the-origin-of-surplus-value/