Something interesting: California is planning to change its primary system after the 2012 elections. Instead of the current system - common across the country, where each registered party holds its own vote, and the winner of that gets a designated slot on the ballot - they're adopting a system very similar to Louisiana's "primary" system. Pretty much everybody who gets enough signatures is placed on a statewide ballot, and then the two highest placers from that are the general election candidates. They can even be from the same party, as long as they're the two highest votes.
Louisiana adopted it back in the Jim Crow era as a way of making sure only party would ever be in power, but it's wound up having a moderating effect on the elections. Normally, each party's candidates are picked by the 5-10% of the population who give enough shits about their party's plank to turn out, dragging the general election toward the most stalwart platform guys. With this system, you get exactly two choices in the general election (as opposed to usually just two), but they're both chosen by a plurality of the whole population, necessarily making them considerably more "centrist" (if that's your thing).
Of course, it also means you're likely to be choosing between the two best funded candidates who can get the necessary recognition, and it often means that you're still getting one candidate from each party. Instead of holding a primary, the state's party leadership just picks a guy to back as the "real" representative, to spend the party's money on. Still, it's theoretically a moderating development, and I think another half-dozen states are considering the same thing.
This just in: Andrew Breitbart dead at 43.
Huh. Well, that's sad. Funny that I haven't heard mention of it anywhere on TV.