I was extremely pleased to see Unity '08 announcing that it is "building out tools right now so our community members can discuss and rate candidates in a more structured way, formulate split-ticket scenarios, and even build caucuses around possible ticket combinations." This is something I've wanted for a very long time. Yeah!
At the same time, I hope they make it easy to similarly form issue-based Caucuses, to advocate different policies. Personalities are important, and perhaps essential, but since we know so few of the potential candidates we need to give them an easy way to find communities, not just vice versa.