I know! I know! It's too hot to be thinking about coats. Let alone ones of the long sleeved, hooded variety. But I finally have the pictures, so I'm-a gonna post it!
I made myself a coat like this last year, but it was vertically striped with purple and black yarn. (My favorite coat ever!) My girlfriend told me she wanted one, but in all black, so I decided I'd take a picture of the pieces I used to make it, and then post the final pics! (Maybe I'll get pictures of my purple and black striped one on here someday.)
The entire coat was done in double crochet, with a cute border around all the edges, (that's hard to see) and I basically just made a bunch of rectangles (and did some inc on the main body of the coat) and stitched them all together! In the pictures, it looks a lot more floppy than it really is, she's much taller than me. And the hood was made extra-big, for when she has a dance performance and has bigger hair.



Links:
[1] http://crochetme.com/forum/altered-amigurumi
[2] http://crochetme.com/forum/ionic-bag