Is AirDrop possible between iPad, iPhone and MacBook?
Solution 1:
You cannot use AirDrop with iOS devices. It is a feature that is exclusive to supported Macs (and unsupported Macs through a hack, as you've pointed out).
If you are interested in sharing files with your iOS devices, I recommend a solution such as SugarSync or DropBox, or a Wi-Fi tool such as Instashare.
Apple intends for you and developers to use iCloud to get documents from PC to iOS, but it's not widespread yet and perhaps ever.
Solution 2:
Looks like iOS 7 is going to have AirDrop as the new UI has an icon for AirDrop right next to the icon for AirPlay.
Solution 3:
It has been announced that starting with OS X 10.10, Airdrop will interoperate between OS X and iOS.