I've been playing with qik recently as anyone who has caught any videos from me will know.
Qik allows you to broadcast live streaming video from your mobile phone. There's usually a small delay before it'll appear in my live channel (see latest from the channel below) but it's close to live.
This evening from 6.30pm (UK, BST) I'm going gliding - and I'm taking my mobile and qik with me. I managed to broadcast on just a couple of bars of 2G signal recently from a forest in Norfolk. I reckon hundreds of feet above the Cambridgeshire countryside should offer an even tougher challenge! Here's what I've written about qik before.
UPDATE The rather disappointing outcome appears below: