Representing large numbers has always been a focus for many information aesthetic visualization pieces. Think about 1 Billion Dollar (Physical), 6 Billion Others, World Population One, the Megapenny Project, Chris Jordan's American Self Portrait and Rice Demographics as some relevant examples.
By courtesy of mint.com, the following animated infographic movie illustrates the relative size of "1 trillion", which generally does not seem much bigger than "1,000 billion". With the recent news about the financial crisis and government spending, the notion of numbers have become even bigger. But one trillion dollars is a number that few people can comprehend, let alone one's standard 9-digit calculator. So what does one trillion dollars look like? You can check the movie below, or check out the static illustrations.
PS. Is mentioning that "1 trillion dollars is bigger the Australian GDP" strange to anyone? Can anyone correctly estimate GDP numbers, let alone of a sparsely populated, commodity rich, but massively sized country?