Time is ticking, arch linux has updated its kernel to 3.6.10-1 and zfsonlinx in the aur can handle that.
Sounding like a broken record, download spl-utils, spl, zfs-utils, zfs and build it.
Use "sudo depmod -a" to generate your modules.dep and map files with the lates versions.
Use " sudo systemctl enable zfs.service" if you want to add zfs as systemd service.
Since i'm on it to migrate my fifth machine from systemV to systemd (with an delay of over one week per machine) and i've searched now the third time a the solution for the following step, i want to provide my results here.
I am using the archlinux migration howto (german) and i always struggle with the part "add >>init=/bin/systemd<< to the kernel line of your boot loader".
The debian wiki provides a description for this task when you are using grub2.
# $EDITOR /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet init=/lib/systemd/systemd" <--- Change this line
# update-grub
# or (for arch linux)
#grub-mkconfig -o /boot/grub/grub.cfg
So i run into trouble building the zfsonlinux on the kernel 3.6.2-1. I could not build the spl part. So currently i only can build up by the git source.
Use spl and zfs and build it (./autogen.sh, ./configure, make pkg, pacman -U *.tar.xz).