Let me comment on this a little bit...
I think that this "daily update" think is kind of a hype.
I mean, it's surely nice to have regular, frequent updates - but c'mon, it's just
not true that new computer viruses come out every day! What really counts is the speed at which an update is issued after a
realvirus appears...
So, I think it's more important to scrutinize "time of last update" (that is, the last time it was found out that we're up-to-date) then the date when the last update was issued...
Just my $0.02 worth.
Cheers,
Vlk