I'm not holding my breath for a new party, but I am thinking that there might be a handful of issues where the marginalized from each party can force some solutions - bank bailouts, military adventurism, etc. In my mind the solutions on a lot of issues aren't that hard to craft, but they are hard to break through entrenched interests. That is kind of the story of US political history - things take much longer than they should be they eventually break through and quick.