Things can go viral. Keep an eye out for the latest memes in Web 2.0. Web 2.0 sites are largely dominated by left-wing people - these guys/gals determine what is popular on these sites. You won't get something popular by extolling George W. Bush... or it will be very hard at least.
Angela has a point - if it's very interesting or funny or plain and simply NEW, it will move around faster than recycled crap.