This sounds like a pretty cool idea.

One issue I find with it is that I've been updating my political and other views somewhat frequently. Getting someone with the opposite view would be somewhat odd, and probably most of what we debate would be specific ideas that don't particularly correlate with each other, so I might need more than three.

Along axes that I don't have strong opinions, it would probably be more of a discussion, which would still be cool.

It totally sounds worth a try though.