Make your own Wee Planets

I've always really liked the little planet images that people have made out of panoramic photos.  They are very Little Prince.  I've seen this done by a few photographers now.  For a couple of examples check out Alexandre Duret-Lutz's flickr collection of Wee Planets.

I found a tutorial on Photojojo about how to make your own little planets.  You basically take a panoramic photo and stretch it into a square.  Then you apply a polar filter.  It sounds simple but I think it takes the right photo and some handy Photoshop clean-up work to make it look awesome.  I'm totally going to try it.