I'm currently transitioning without the BC. I've been doing deep conditioning treatment and doing low manipulation styles. I find that the less that I do with my hair, the more it grows. The more it grows, the more I can cut the relaxed parts off. I colored my hair in Jan '07(one month after my last relaxer) and I've been using the colored parts as my "demarcation" line.
http://public.fotki.com/LaBelleChele/