I have just finished a utility for integrating the Korg Microkontrol with MaxMSP using a simple OSC protocol.
The max patch is available from my website:
It converts the tedious SYSEX communications required to use the Microkontrol in 'native mode' (thus giving feedback control of the LEDs/LCDs) into simple OSC. It also provides up to 6 virtual banks of storage/state recall for all the control elements on the unit.
The download includes documentation of the OSC protocol, and an example max patch showing all the OSC messages in use.
Hopefully some people (especially those who's native tongue isn't HEX) will find this useful. Cheers