Protest, but don't despair, O chocolate lovers! Hershey just announced that they will FINALLY be offering a version of their Bliss brand chocolate that is 100% from Rainforest Alliance-certified farms beginning later this year. It's a step. In the meantime, there are other companies that are actually committed to investigating their supply chain and providing ethically sourced chocolate.
Here are just a few:
3. Alter Eco
Sorry if this is slanted slightly towards dark chocolate. It's a weakness. :) Several of the above are available at Whole Foods (where I just tried Chocolove for the first time a few days ago. YUM!). Henhouse and HyVee carry quite a few Newman's Own products. I've heard that Trader Joe's also has some good options.
Chocolate labeled "Fair-Trade" is probably the best way to be sure you're not supporting slavery, but buying organic chocolate is a pretty good guarantee as well since US companies go through a very detailed process to be certified organic.
Happy Valentine's Day and all that.