Just as a heads up, Author & Punisher is going on tour in the UK in May. If you haven't yet, look up some of his live videos and interviews on Youtube (may be under his name of Tristan Shone). The guy is seriously talented, producing quite dronish, industrial sounding music with instruments that he's made himself. Not strictly metal, but may be of interest to some of you.
I myself will be going to his Birmingham gig (Saturday 11th May), where he'll be playing with Gnod and ORE.
EDIT: Two interviews with Tristan here, showing off his working process and some of his contraptions. The first one is older and has some instruments that are now relegated to a much lesser status; the second is newer (with mostly his current instrument lineup) and touches upon some of the stuff he's been developing (synth masks etc)