The first meeting of the VHC reading group will be this afternoon at 2:30 in MSCS 405. (Sorry I'm sending this to everyone on the mdtop list: I didn't take attendance after the seminar yesterday!) I am still trying to track down a PDF copy of Dani Wise's CBMS lecture notes on cube complexes, but you can find a very rough outline of his approach here:

http://ldtopology.wordpress.com/2012/03/06/wises-conjecture/

You may also want to look at Ian Agol's preprint on the arXiv

http://front.math.ucdavis.edu/1204.2810

and the paper by Bergeron and Wise that started it all

http://front.math.ucdavis.edu/0908.3609

Jesse