Here are some links related to past & future concerts:

sOUTH kOREA AND usa

• Interpark tickets (Korean) - Seoul, South Korea
  
• TheYeogiyo (English) - Seoul

• gruvr concert map - Seoul

- a cool way to look into the concert scene in Seoul, South Korea

• Event list of Seoul concerts
• koreagigguide.com/concert-calendar/
• Yes Asia concert & music video DVD list
• soompi listing of US concerts
• PowerHouseLive
• Korean Music Festival 2009 in Los Angeles
• Korean Concert Society - USA

This list will be updated or re-posted in the future.