Gusts of Popular Feeling has a post on some of the activities commemorating the anniversary of the Gwangju Massacre, which began on May 18th, 1980. He also links to the many he has written before on the topic.
In spite of the solemn occassion, last year people channeled the spirit of the uprising into Mad Bull Shit. This year, the cause some chose to take up was the arrest of truckers' union protestors. Turns out that police don't like it when you attack them with bamboo spears.