iPad usage with multiple separate Bluetooth Devices simultaneously? Is it possible to use a BT Keyboard and BT Speaker with iPad at the same time? e.g. Listening to music on BT Speaker using iPad/ iPod, while typing other apps on the iPad with BT Keyboard. Can the above be done on iPhone? Or BT Keyboard with BT Headset? Talk over VoiceChat/VoIP App using BT Headset and Typing notes using BT Keyboard at the same time/ simultaneously? Simultaneously?