Guys from what I have gathered the Quad core multiplier control is a BIOS only problem and yes abit are working on it - in fact they are working on it for CeBIT

The mod above is not to do with the multiplier issue:

About two weeks ago, EVGA announced that their NVIDIA 680i SLI Motherboards have gone into the Revision A1 state, an updated revision with improved overclocking for the Quad Core Kentsfield Users.
This mod improves FSB scaling only.