In work atm but will definately give that link a look.
if you haven't read it I'd suggest getting the book "DMT: The Spirit Molecule":
http://www.amazon.co.uk/DMT-Molecule-Revolutionary-Near-Death-Experiences/dp/0892819278Amazing drug but I'd suggest trying your guarden veriety psyches first before jumping into it.
Very intense but very rewarding.
albeit for a much shorter timeframe than mushrooms
I was under the impression ayahuasca had a mightly trip duration.
In the region of 12-48 hours.
That's been the main reason I'd held off on it.