This is a hopelessly belated post, but recently there was Startup Seoul (link in Korean), a great event put together by three startup entrepreneurs - David Lee, John Kim, and Daesan Hwang.
The event was held in the chic office of Zenitum, where David works. Two startups presented their services in front of other startup folks, who provided some intense feedback. The presenters were SundayToz and HugeFlow. SundayToz is a social games startup, and they are just about to unveil an RPG game on Facebook; HugeFlow, a Silverlight and RIA (rich internet app) specialty house, is trying to apply their RIA technologies to create a more interactive, user content-rich online map.
Overall, my expectations were totally exceeded. We had great startups, the food was good, and the discussions had substance. People always ask me if there is any good web startup meetups they can join, and I think Startup Seoul can be a good one. (The next one hasn't been scheduled yet, but you can stay tuned.) Given one of the organizers hail from Canada (that's David), I'm sure the event is pretty open to English-only speakers too.
TAG Startup Seoul