I just discovered Poladroid -a polaroid making software- in Ready Made's blog.
You drag a jpg on the polaroid camera on your desktop and it transforms it into a polaroid, with the darker edges, the color shifts (even from one pola to the next with the same image).
It's as realistic as can be, it makes the oh-so-familiar noise, and you have to wait for the image to appear... You even have to reload the software after 10 photos!! Download it here, it's free.
I know it's cheating, it doesn't replace the real thing, but that said, it's fun.
all photos by me !