Time Machine wishlist

What would be some of the features that you would want from Apple’s Time Machine ?

1. “Real” incremental synchronization
   Currently, Time Machine’s unit of change is a file. Each time a file changes, the whole file gets copied. With today’s technology, this ought to be done at a block level. This particularly is useful as some of the files can get really big.
   
   For e.g., if I am running Parallels or VMware Fusion on my Mac, then those images get changed all the time. This is where I really really wish Time Machine would do block-level change identification and update them.
   
   
2. De-Duplication
   This would be a COOL feature to have. If you have #1, #2 would be a logical alternative.
   
   
3. Time Machine over NFS/SMB/AFP
   Me too.
   
   

Obviously,  #1 and #2 are NetApp-like features but they would indeed be VERY VERY cool on Mac. I have gone the other way as well.