> we're using httrack as part of an internal project 
for 
> which we'd like to provide some 'realtime' stats.
> [..]
> On the '#Z' option, could you also explain exactly 
> what its saying? 

Rate='realtim' transfer rate for the last 60 seconds 
(total bytes)
NewLinks=Number of new links added of the stack

But you may use the engine sources as a library (see 
the lib/* example), this might be a more convenient 
way to control or do some shaep stats!