Charcoal in the Growing Medium

At our local bonsai club meeting sometime back, a couple of guys had an interesting discussion on the merits of using charcoal as part of a bonsai soil mix.  I can't remember what the outcome of the discussion was (probably more concerned about getting myself coffee and biccies, as usual) but this blogpost at Yamadori Passion may interest some of you:

http://yamadori-passion.blogspot.com/2010/03/carbon-carvao-charcoal.html

Have a gander over there.  Loads of great photos from his travels.  My recent fave is his series of posts on the tools he uses for his yamadori.  Good stuff.