Most MIRI research output (papers, in particular the peer-reviewed ones) was produced under the direction of Luke Muehlhauser or Nate Soares. Under the direction of EY the prevalent outputs were the LessWrong sequences and Harry Potter fanfiction.
The impact of MIRI research on the work of actual AI researchers and engineers is more difficult to measure, my impression is that it has not been very much so far.
Was Eliezer ever in charge? I thought that during the OB, LW and HP eras his role was something like "Fellow" and other people (e.g., Goertzel, Muelhauser) were in charge.
There have been a couple of brief discussions of this in the Open Thread, but it seems likely to generate more so here's a place for it.
The original paper in Nature about AlphaGo.
Google Asia Pacific blog, where results will be posted. DeepMind's YouTube channel, where the games are being live-streamed.
Discussion on Hacker News after AlphaGo's win of the first game.