Usain Bolt of Jamaica, the 100-meter world record holder, ran the fastest 200 this year in 19.67 seconds at a meet in Athens Grand Prix 2008. Amazingly, Bolt has not yet decided if he will run both races at the Olympics. This race ranks him as the 5th fastest man ever in the 200-meters.
Here is the video from YouTube:
UPDATE: Sorry, the video is no longer on YouTube.
And here is a great amateur recording from a different perspective, also on YouTube.