One more vote for the GVG...  Otherwise if you dont want to buy one, you can build yourself a vaporizing pipe.. Search "green buddha" here in the forum for instructions/material-purchase links.

The Machine def works, but there is no buffer between the fire source and the DMT, so it will very likely generate some combustion and not just vaporize (meaning less effective, harsher on the throat).

I never tried the volcano with DMT, I use the volcano too much with hash and I bet it would all reek of DMT forever, I dont want to ruin the taste of my hash