Yuppers what he said.
The A7V266E is based on the KT266A chipset. It's approximately 10-15% faster and overclocks much better than the KT266 chipset (which the A7V266 uses).
The A7V266E should be on the market in the US late this week or early next. Seems like there is RAID, non-RAID, integrated ethernet, non-ethernet versions... so be sure to look @ the specs before you buy. Might end up getting the wrong thing if you're not careful.