I've created the script below a while (year) ago. It (deb)bootstrap a working Debian Wheezy with ZFS on root (rpool) using only 3 partitions: /boot(128M) swap(calculated automatically) rpool(according to # of your disks, mirrored or raidz'ed).

All commentaries are in Brazilian Portuguese. I didn't have time to translate it to English. Someone could do it and fill a push request.

https://github.com/turrini/scripts/blob/master/debian-zol.sh

Hope you like it.