Korean is one of the most "taken" languages for IDNs by locals. Almost all com and net names of high value are reserved.
Verisign just entered the next stage of the idn.idn game by paying ICANN for the rights to .com and .net gTLDs in Korean language. Pending no objections or holdups they should go live in the root in the next year or so.
There are buyers for Korean names, but very few sellers. μ¬νμ¬.com (travel agency.com sold for $2500) not too long ago, and at Snapnames last year Casino.com in Korean brought about $11,500.
It is an IDN in the Korean language: [ame="http://en.wikipedia.org/wiki/Internationalized_domain_name"]Internationalized domain name - Wikipedia, the free encyclopedia[/ame]