sbaker, how long have you been transitioning?
I'm transitioning as well and broke my heat challenge by blowdrying just to get my nappy roots straight. I have about 8 weeks of new growth and it's holding up pretty good. I found that wet wrapping works pretty well too (gotta make sure it's wrapped tight and the roots are pretty straight).
Several ladies have mentioned that the ponytail method and rollersetting should get your hair straight. But when I do a rollerset, the rest of my hair is straight but not the roots.
But I'm not going to worry about having my hair straight anymore. I'm going to start doing the baggie method and braids soon. /images/graemlins/wink.gif