Actually I like the positive or negitive button.
If you agree you hit positive or if you disagree you hit negitive and then show a number off to the side. negitive for disagree and positive for agree.
So a way it could be used is, 2 people offer 2 different options to a solution. Instead of having people put

you could just click on the option you would perfer.
It may make it easier for someone to make a decision if they unsure of which way to go.
Here is an example from ozbargin
http://www.ozbargain.com.au/node/90204