Zingu.com, the local OVKor upstart, made an interesting move switching their backfill partner from Wisenut Korea to Openbase, an prominent local search solutions company (which provided Daum community its search, for example, and boasts directory and content match technology.)
This following Zingu's PPC distribution deal with Gajai.com, the korea's largest meta engine (which ironically accounts for a significant portion of Daum's search volume that OV boasts much about).
Zingu's index UI, search box and affiliate programs have since changed and expanded in coordination with the move as well (all include PPC of course).
Zingu's expanded service range, big G's opening of its Korean interface and deal with hanmir, surely mark a continued growth and trend toward PPC advertising and heated up competition in the Korean market.
OV Kor enjoys the market share now, but I have no doubts they will start to feel the squeeze in the time to come (hence their minimum bid price drop as well).
So far the PPC picture in Korea has expanded officially then by one:
Major PPC publisher expansion:
gajai.com ==> zingu
hanmir ==> google
donga ==> OV (content match)
btw, what up WebmasterWorld peeps?! miss my bloated Korea PPC market posts? (shhhh! if you don't even remember me. lol)