The flaw in any kind of "public campaign funding" is that the government, which you are electing, gets to decide who gets the funds. You can see the problem.

A better idea is getting rid of the donation restrictions, which don't work anyway, and develop a system of heavily enforced donation transparency. Cut through those organizations and PACs whose sole function appears to be to shield the real donors from scrutiny. I don't know how you'd handle the details, but every dollar going into political coffers should tell everyone whose wallet it came from.

You'll never get rid of special interests, especially when we have a government that has so much power over the economy (the two are symbiotic), but at least we can make the candidate wear their names on his T-shirt.

I have found this website extremely useful, but there's still a lot of places where the law lets money sneak into the system.