The new Korean ROM contains a new baseband firmware. The version is 32.41.00.32U_5.08.00.04.
The version is identical to the one contained in the newest Desire 2.2 update. This might be the key to 720p on the Nexus One/Froyo.
This update.zip doesn't have the HBOOT as I have no idea how it impacts the rest of the phone and the flashing/downgrading capabilities of the phone.
THIS RADIO CAN BE FLASHED ON ANY NEXUS ONE!
Tested on a T-Mobile version (900/AWS/2100 MHz, European version).
It just works, camcorder and camera still works properly, no need to update the Camera APK.