I have not only heard of it I am alive today because of it. I was diagnosed with stage 4 stomach Cancer that had already spread to my liver, I was given 8 months to live....that was 3 and a half years ago...today I am back at work and enjoying life to the fullest ( inc my grandkids).
When I started drinking Pau d'arco my tumors started shrinking rapidly, I had a CT scan about 3 weeks after I had started on the "tea" and the tumors were visably smaller already...they just kept shrinking ubtil they vanished and touch wood heve not come back. Two good sites are www.pau-d-arco.com and www.herb-care.com
I would recommend anyone give it a try...its not that expensive.
I wasn't really doing much else... I was also taking Essiac, Vits C,E,a good multi with Min, Milk Thistle, Garlic, Lecithin, Bromelane and I fresh juice twice per day and add Liquid Greens.
My diet was mainly whole grains, veg, fruit but I also ate dairy , chicken, and fish, though in small amounts... ( my diet has slipped a little these days ... ;-)
Good Luck...and the Best of Health..