I haven't blogged in a long time, but here are the Korea-related blog posts:

http://blog.leftium.com/2007/06/my-life-prologue.html

http://blog.leftium.com/2007/06/past-month-in-review.html

http://blog.leftium.com/2007/06/my-life-chapter-i.html

http://blog.leftium.com/2010/08/dragon-flies-and-praying-man...

http://blog.leftium.com/2010/09/how-to-eat-korean-food.html

http://blog.leftium.com/2010/10/october-update-whats-good-in...

I have an F4 visa that allows me to stay in Korea for up to 3 years, and it's simple to extend without leaving Korea. Technically I have almost all the rights as a Korean citizen except for the right to vote for president. (In practice it's more limited. For example it's nearly impossible for me to get a loan.)

With the F4 visa, I can work or not work. The F4 visa is granted to people who have relatives who are Korean citizens.