Apple's yearly developer conference should see iOS 8, OS X 10.10, and likely some hardware.
Apple Officially Launches Third-Party USB Charger Takeback Program in 30 Countries
Apple is maintaining separate information pages for several countries involved in the program, while pricing in the bulk of the countries is summarized on a separate "other countries" page.
First introduced last month following the electrocution of a Chinese woman using a counterfeit iPhone charger, the recycling initiative is designed to allow iOS users to safely replace and dispose of questionable third-party power adapters.
Under the terms of the program, Apple will accept and recycle any third-party charger at any Apple Retail Store or participating Apple Authorized Service Provider, and will also provide an authentic charger for $10 in the United States, a $9 discount from Apple's regular pricing.