ZFS send/receive

http://etbe.coker.com.au/2012/08/08/hard-drives-backup/ I've just written the above blog post about my future backup plans. This includes a server that has about 400G of data in the US that I have been backing up via rsync. If I transition that to ZFS then is there any way of starting a send/receive backup process that doesn't involve initially transferring 400G of data? My ADSL plan only allows 150G per month and I can't have a 3 month period of no good backups... -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/