I think the ability to mirror from multiple sources is 
very much a useful and needed feature. As far as using the 
right tool for the right job, what if you need to mirror a 
slow site with very rare content (in my case the old 
ftp.be.com site)? The information would not be found on 
edonkey or any other p2p tool for that matter, and 
downloading hundreds of small files is tedious at best. 

Bradley Barnes