I've recently begun trying out Clonezilla SE on a DRBL-live CD and it works great.
The one problem I've experienced is that clients receiving the DHCP broadcast freeze while loading the TFTP menu prior to loading Clonezilla Client.
It sits at the boot screen for PXE boot menu after it's received an IP from the DHCP server and is about to load the TFTP, with the word "TFTP" and then progress dots ". . ." going on indefinitely.
The solution that works for me is to set the Clonezilla SE IP address to another subnet to the clients; for example the default IP for the clients is 192.168.100.* and I've set the Clonezilla SE IP to a static 192.168.72.44 and it works fine.
Of course, you must agree to set the local ethernet IP to an alias for both IP ranges, if you're using one ethernet card.
Hope this helps someone out there :)