I personally HATE sphagnum moss. I LOVE vermiculite. Vermiculite is a mineral that is mined and used primarily in plant use. But it works great for incubation medium. The only problem is that vermiculite is pretty hard to come by. I used to have to have Lowe's special order it for me, but they won't do that any more. I was able to get some from another member on here, and now I work in a lab that studies plants, so I can get it via that very easily.
I just think it's a breeze to use and have had great success with it. With moss I always ended up with flies and it just never seemed "right" for me. Can't explain it; just the way it is. I believe if you can't get sphagnum moss you can also use more expensive orchid moss (someone correct me if I"m wrong). But the sphangum moss should be easy to come by. The one year I used it I got it from Wal-Mart.