Peter Mansbridge did an in-depth one on one with Liberal strategist David Herle, discussing the upcoming convention. One of the scenarios thrown around, which was particularly interesting, involved a candidate using some of his delegates to vote for another candidate on the first ballot. Herle posited, and said there is some precedent, that Ignatieff or Rae may send some delegates to Kennedy to boost his support on the first ballot and keep Dion well back in fourth. The theory being, a weakened Dion would be less of a threat, as well as the added bonus of those delegates coming back on the second ballot to show artifical growth. Dion is wounded, Kennedy doesn't grow naturally with the defection of the planted delegates and the frontrunner looks viable.
The idea sounds far fetched, and somewhat dubious frankly, but it sure demonstrates how complicated this convention could become. Delegates as pawns, how democratic and empowering ;)