Looks like Korg are working on 64bit versions of their plugins.
Saw this on Gearslutz.
http://www.gearslutz.com/board/music-co ... erall.html
Looking at the Korg spreadsheet on the Korg Legacy Series software - by the end of the year with a bit of luck:
"*1: Please use the latest versions which can be downloaded freely for registered users at www.korguser.net
NOTE: The new versions require the version 1.2. If you are a KLC-1 ( or ANALOG EDITION and Virtual MS-20) v1.0 - 1.1 registered user and do not have version 1.2 registered to your account, you must purchase v1.2 upgrade. For more information, please visit www.korguser.net
or contact your local Korg distributor..
*2: Although not currently 64-bit, we plan to have 64-bit versions within the 2012 calendar year.
*3:We will check compatibility when major DAWs are cleared for support of Mountain Lion."