Unfortunately here on the East Coast both Koreas are kinda difficult; I don't recall if Seoul has any relay agreements (such as with Sackville); North Korea is VERY difficult, partially due to their somewhat erratic schedule (which may become a little more clear, now that a propaganda war is about to start...)
The place to check would be the
NASWA master spreadsheet which Dan updates every couple of days; don't forget to listen in on DX Listening Digest and check the various SWL related mailing lists.
This could get interesting...73 Mike
[edit] You could also check Beijing, Vietnam, Thailand (via the Udorn relay base) and Tokyo as other information sources. Indonesia's so-called 'external service' is very hard to hear on the East Coast due to propagation, but might be possible. Just don't expect it as a regular...