Rsync lib based differential backup

Hi,

Due to recent ganme problem, I can't go very far to old post so I'm 
starting a new thread. 

Recently there was an interesting discussion on using rsync lib for true  
differential backup -- backing up only the changed parts, not the changed 
files. 

I'm wondering if it is anywhere on the horizon.

Thanks

-- 
Tong (remove underscore(s) to reply)
  http://xpt.sourceforge.net/techdocs/
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