In Canada, iTunes cards purchased for use on the iTunes.ca site cannot be used to purchase iPod/iPhone apps. You can purchase music, but not the apps. When one unhappy consumer complained to iTunes that she didn't want songs, she wanted apps, she received a quick response from iTunes. They offered her 5 extra songs. Obviously, they don't read their complaints, they just cough up additional music in response. This Christmas: don't buy anyone an iTunes card.

Completely Erase Your iPhone's Data - There's currently no Apple-provided method to securely erase your iPhone's data, and previous owners' data has been found on refurbished phones on sale at Apple. If you want to make your iPhone safe for resale by securely wiping any trace of your personal information from it, it's possible—though not easy.