Let the fun begin. Election returns have begun to filter in, and the networks have begun to predict winners for the presidential contest in non-swing states and in some Senate competitions. DCist on election TV, Senate and House races to watch, and when the polls close across the nation in Eastern Time Here’s some handy links for results: W. Post, Yahoo Election, CNN, NY Times, BBC News “Vote USA 2004”, DemocraticUnderground.com. To keep your…