At first: Thank you! Thats great.
Two things to mention (ubuntu image):
1. apt-get update results in: "Failed to fetch apt.armbian.com/dists/trusty/InRelease". Upgrade works.
2. At first boot, the system is expanding to the whole sd-card. The problem is: If one wants to clone the card (e.g. with additional software) this can cause a problem, because the SD-cards do not have always the same size (8GB != 8GB). And I do not know if a shrinking of the memory is a clean solution.