Apple just published a supplier responsibility page on their website as a response to repeated questions about its suppliers facilities and treatment of workers in China. You can also download Apple’s 2010 Supplier Responsibility Progress Report in .pdf format here.
Apple is committed to ensuring the highest standards of social responsibility wherever our products are made. We insist that our suppliers provide safe working conditions, treat workers with dignity and respect, and use environmentally responsible manufacturing processes. Apple’s program is based on our comprehensive Supplier Code of Conduct, which outlines our expectations for the companies we do business with. We evaluate compliance through a rigorous auditing program and work proactively with our suppliers to drive change.