I just found out that an iPad can get Internet through Bluetooth tether to iPhone ( I did search the forum to see if this has been previously posted).
Personal Area Network Profile (PAN)
Personal Area Network Profile provides network connectivity over Bluetooth. With iOS this is common with multiplayer games and Personal Hotspot on iPhone.
iPod touch and iPad with iOS 4.3 or later support Internet tethering from an iPhone with iOS 4.2.6 or later, through PAN.