Just saw Howard Finemann on Countdown and he discussed how Obama is bidding to change the structural way in which political campaigning/organizing is done and he listed the history from Andrew Jackson through FDR and then Reagan to today.
The thing Finemann discussed was that Obama volunteers go person to person and do not have to (as he said) route back through the central office. Each has a great degree of autonomy. Obama in other words is applying open-source methodolgy to US political campaiging. The organization is adaptive in the specific meaning of biology and information systems theory: the head office works very hard on creating what it calls the brand (image, message, stylistics, aesthetics) and then holds very tightly (almost maniacally) to that brand. Experimenting occurs across the regional/local field offices as to how to best get that message out. The entire system is nodally linked through the barackobama.com website and then each of the staff and volunteer groups can post on effective strategies which get immediate feedback (and cross-connections) throughout the entire network in real time as they say.
I think this is going to have a huge effect on the outcome on Tuesday.
A video of the Obama organization in the state of my birth (h/t E. Klein):