A reader passes along this interesting bit of information:
The 6th Gwangju Indie Music Festival (2009 광주인디뮤직페스티벌) will be at Gwangju's "Club Nevermind" and at a place called 매개공간미나리. The club is a couple blocks from exit four of Geumnamno 4-ga Station, as you'll see from this map via Naver. You'll find a timetable for the 31st and the 1st on the club's Daum Cafe. The poster above says tickets for one day are 20,000 won at the event, while two days are 33,000 won, with a slight discount available for online reservations via Interpark.
I'm told some of these performers are big deals, though I'm unfamiliar with all the names because I don't know anything about Korean indie music.
There was an article about Club Nevermind in the June 2008 issue of the Gwangju News, on page 26 of the .pdf file available here.