Never underestimate the power of rsync.
 
[...]
 Then, during the week run rsync's with --delete to keep things 
nicely in sync.  This is something ndmpcopy can't do (I think).... 
if you do a level 0 + level 1 you won't get deletes.  
 
No, that's completely false. ndmpcopy uses the same underlying apparatus
as other ndmp operations (or straight dump / restore, for that matter).
Deletions and renamings are dealt with correctly in incremental dumps
and restores: they wouldn't be much use if they weren't.
-- 
Chris Thompson