These are fun projects with cool results.
Below is my latest Tiny Planet and also the panorama which lead to the creation of it. As you can see it's the very same view, but displayed in two very different ways. And both are actually pretty cool and with very distinct differences.
Where can I learn how to do this?
Colin Smith with PhotoshopCafe explains things so well and really helps me understand the workings of Photoshop so much better. His instructions of how to make a Tiny Planet is great!
Andrew Trice with Adobe shared his workflow here. Andrew always does some fun stuff and he has been a great fellow instructor at our Adobe Aerial Photography workshops. Here is how he does the Tiny Planets.
Photojojo has another good workflow how to make these Tiny Planets.
Photographymad also gives you great information on the Tiny Planet project.
Check them out and let me know how your Tiny Planet turned out! I might come and visit...
This was shot with the DJI Phantom with a GoPro Hero3 on it.