For the most part you would want more negative camber. I don't know exactly and I think it will vary from car to car. My honda did very well with -.5 in front and -1.5 in the rear. I use a temperature gauge to see how it's effecting the tire. On the porsche I have -1 in front and I beleive -.5 in the back but I could be mistaken on that.
Sure there are some people with some good settings if you look in the racing forum.
The idea is to have your tires sitting flat in the corners. You want to make sure you are using the entire tire.
You can also mess with the toe and castor and such. I admit I don't really understand castor but setting the toe out on the front makes it much more responsive but annoying for everyday driving. Never set the toe out on the back that could be interesting
