Just got word that Amdmb.com have posted there VIA AGP 4.40 Driver Preview! Here's a snip.

When we first published our results in our nForce2 and KT400 Chipset Comparison article in early November, very quickly we received word that VIA was indeed working on a solution to this problem that we had brought to light. Our first response was that the drivers from VIA for their 8x AGP support were just behind the times. And it turns out we were right. VIA AGP 4.40 Driver Preview