If one needs to get an idea of the kind of appeal that Obama’s campaign has generated within the internet community and particularly the younger segment of the US population, check eBay listings.
eBay bids on posters ( including unauthorized reproductions of posters) created by artists for Obama’s campain offer a fair idea of the popularity of both the candidates on the younger and internet enabled population.
Here are two screenshots of results using the keywords: “Obama poster” and “McCain poster” respectively. Obama limited edition posters are on their way to becoming collectors items. McCain branded products are not doing any business and honestly look quite boring.