I'll vote for keeping it all in one blog as well. For me, the biggest draw to your site is the stuff on Korea, but it wouldn't really be enough to keep me coming back every day if it wasn't for the other blabber that makes this site interesting and original in a very wonderchicken way.

People might disagree with me on this, but I think multi-dimensional blogs are far more interesting than one-dimensional blogs that talk about only one aspect of life such as politics or music. Which doesn't mean that blogs don't need focus, but making every post fit strictly within the realm of a specific subject is pretty restrictive I think.