Wow, im really glad you like it. . . Its just really Infrared photography, which you really do play around with in postproduction editing. . .I just played around with the channel mixer and blurred it a bit. . .But mostly the effect was achieved from the in camera setting itself. . .if im not mistaken, the White balance was set to Fluorescent +3, and the capture format in RAW mode, it helps you get more tonal value and be able to separate the sky from the trees and such in post production. . .
Hope that helped. . .feel free to ask if theres anything else i can help you with. . .
Ciao!