> I am trying to make sure I am not missing something, but I really
> would like DateAndTime now to return the current date/time with
> millisecond clock precision.  I know there has been a lot of
> discussions on this in the past with folks desiring nanosecond
> precision -- but how about just millisecond precision from the system
> clock.
>
> Am I overlooking something or is this just not implemented on
> DateAndTime now?

The problem is that you don't know what the offset is between the millisecond 
clock value and the current time in seconds.  The only way is to watch the 
millisecond clock and try to figure out what the value is when the second clock 
ticks over.  I posted a changeset that does this calibration and gives 
DateAndTime now millisecond precision, but at the time the decision was not to 
harvest it.  You may still find it useful, however: 

http://lists.squeakfoundation.org/pipermail/squeak-dev/2004-February/074400.html

Avi