Paul Maslin, a consultant for Howard Dean in 2004, points out that "if the economy and the performance of the economy will dictate ultimately the outcome of this race, then again we're looking at, maybe not an FDR-like, but certainly a historic Democratic victory of large proportions." This comes from a roundtable that you can find here, where it was also said that "It's clear that the McCain campaign isn't going to have anything near the kind of ground game in terms of turnout and organization that the Bush campaign had in '04." A possible map of Obama's victory is above here. It shows Obama collecting 317 electoral vote (and possibly 344 if he wins in Florida), approaching the record of Bill Clinton in 1996 with 379 electoral votes. You can find the map, and more data at: http://www.electoral-vote.com/