One show just closed, one show just opened this past weekend.
Mike Kelley's retrospective at MoMA PS1 just closed Sunday. Kelley with Saul Melman and Matt Mullican at PS1, New York 2013:
Mike Nelson's Amnesiac Hide at Toronto's Power Plant just opened Saturday. I haven't seen it yet; so I have nothing to share here - maybe later if I get a chance. But I have this picture from his installation The Coral Reef at Tate Britain, London 2000: