Apple will now replace faulty sleep/wake buttons on the iPhone 5:
https://ssl.apple.com/support/iphone5-sleepwakebutton/
Also:
"If you believe you have paid for a replacement due to this issue, contact Apple regarding a refund."
https://ssl.apple.com/support/iphone5-sleepwakebutton/
Also:
"If you believe you have paid for a replacement due to this issue, contact Apple regarding a refund."