They just got done with the 2013 Worlds in Forbes, NSW. My longtime friend Davis Straub (author of all the Windows Secrets books and longtime top HG competitor, presided over the event, not having quite qualified for the US Team).
You can read about the daily blow-by-blow on his The Oz Report. It begins in issue number #3 of the year.
Update: Here’s what the first World Competition looked like, from 1978. Back then, they competed over time in the air, 10-15 minutes on average. Today, it’s distance to goal in minimum time. Goal distances are typically 100-200 KM, time in the air 2-3 hours. The new distance record in a single flight was just surpassed this last summer from Zapata, TX, 760 kilometers.