> I see that the -V switch may be used to send 
> mirrored files to another command.  What would be 
the 
> syntax to add files to a tar file as they are 
mirrored.  

Use something like:
httrack www.foobar.com -V "tar uvf foo.tar \$0; rm -f 
\$0"

But with MANY files, tar is a little bit sloow