Just to let you know of my own personal experiences with FOG setups, I use Ubuntu server 10.04 for the main fog server, I never update it because when I have in the past when I first started using fog I found that things broke (not necessarily to do directly with fog software). I also have a second storage server that I’ve been using that works for me seamlessly on Ubuntu 12.04. I’ve basically stuck to these because I’ve found the platforms solid for what I’m doing.
If you would like help setting up I am sure I could help out and I’m perfectly willing to talk you through the process.