With the update of signatures dated 1/3/2007, eTrust is no longer being reported as "out-of-date" by Security Center.
Talk about Y2K issues, this was an "every year" issue.
I can see the logic inside the WMI provider from CA eTrust:
bool productUptoDate(){
...
if (signatures_Year < current_Year )
return false;
Link to CedarLogic - Shawn Cicoria : eTrust 7.1 AntiVirus Out of Date issue on Vista RTM - Forefront looking better each day