What XMB features can I access in-game?

In Firmware 2.40, in-game XMB access was introduced. The features you can access in-game include:

• [Users]
  • Turn off System
• [Settings]
  • [Accessory Settings]
    • Reassign Controllers
    • Controller Vibration Function
    • Manage Bluetooth devices
    • Audio Device Settings
    • Voice Changer
• [Photos]
  • View Photo Information
  • Delete Photos
• [Music]
  • Play music (if supported by game)
  • Delete Music
  • View Music Information
• [Game]
  • Trophy Collection
  • Quit Game
  • Start another game (quits current game)
  • View Game Information
• [Network]
  • View Active Download
• [Friends]
  • Block List
  • Add a Friend
  • Players Met
  • View/Send/Delete/Protect Messages
  • View Profile
  • Compare Trophies
  • Delete Friends
  • Block Users
  • View Message Information
  • Accept Friend Requests