I've been tracking Google's stats for some 2008 Presidential Election-related searches in an effort I've been calling "Google the Vote". The results have really helped to keep me in touch with how the election is shaping up. My blog entry on the topic is titled, "Using the Web to predict elections." I touch on a few ways that people are tracking Web-based data for the election such as Google Trends and Intrade.
I really do think that the Web is going to become a more and more accurate predictor of elections over the years, and eventually live-polling will be an antiquated and moot factor.