I'm trying it compost mixed with some garden soil spread over grass seed in about a 4x4 spot where weeds were growing and the dogs peed on it and killed it all. I have now 2 spots just waiting for the grass to show.I'm also very interested to see how this works. My lawn is in a sorry state right now. I'm just not sure I want to spend my precious compost (and elbow-grease)on the lawn.
Maybe I'll try it in a small controlled section and see how it works.