I'm terribly allergic to PI also, and I wanted to advise caution about using a weed torch... it should work, but be really really sure you don't hold the flame on the plant long enough to produce smoke. You can get a horriffic reaction from breathing fumes from burning poison ivy (watch out for fall brush burning piles, also).
I've started using Tecnu scrub when I come in from the garden -- I've been told it's the stuff that utility workers use, and so far so good. I also am religious about wearing gloves, and I switch to a clean pair if I think I've even come close to PI while weeding. The PI in our yard is very well established in the fence row of trees, and there are some tremendous roots out there, so weed eating just doesn't do the trick... I've been using roundup poison ivy & brush killer out there for years, and the situation is improved but still not cleared up. Regular roundup just doesn't seem to affect it at all.
