MAI - Platform for immaterial and long durational works
Miranda July - interesting artist working across all disciplines and contexts
Vdrome - online platform that offers regular, high quality screenings of films and videos directed by visual artists and filmmakers, whose production lies in-between contemporary art and cinema.
Flavorwire - cultural news and commentary - great lists
Video Data Bank - lists a leading resource in the US for video by and about contemporary artists
Art21 - PBS documentary series on contemporary artists and their work (search by theme or artist)
Art Report - rankings of artists, up-to-date ticker
x-tra - quarterly contemporary art journal out of LA