This image contains FreeBSD 10.0 64bit on a 20GB filesystem and the ACS scripts for getting the SSH keys and root password.
It has VirtIO drivers included and activated (so use a VirtIO enabled profile, e.g. "Other PV 64bit")
It also has Xenguest-tools installed, but disabled in rc.conf if you'd like to use this in Xen/Xenserver. A conversion from qcow2 to vhd is necessary in this case.
The default root password is:
Password4cloudstack
Change it ASAP!

If you want to modify it and still use it as a template you can run the bundled "nux-sysprep" script to wipe out host specific stuff like SSHD keys, random seed, logs etc.
Don't forget to wipe the shell history as well with "history -c".

The partitions are referenced by the GPT label so it shouldn't be a problem if naming canghes from vtbd0 to ad0 or similar (untested, feedback appreciated).
If resizing is required, after increasing the underlying qcow or vhd file, from inside the OS you can simply run:
gpart recover vtbd0
gpart resize -i 2 vtbd0
reboot

After reboot just run "growfs /".

Network configuration is modified in a similar matter, see what I did in /etc/rc.conf.