I'd like to try DMT before I die, but even while living in the Netherlands I'm having a hard time obtaining it. I might try extracting it myself some day but I'm not much of a DIY in that respect and I'd probably light up my garden shed.
The Doors of Perception is his best work. I always felt that there was something lacking in his fiction. Enjoyable, but I could never quite call it literature.
http://www.matrixmasters.net/blogs/?p=1509
Of course there is also Rick Strassman's book The Spirit Molecule, as well as James Orock's book Tryptamine Palace which is about 5-Meo-DMT. I'm way too scared to try either, but really interesting stuff.