tool for image building and update

[Tomas Karasek]

Hello,

I am looking at possibilities of automation of disk image creation (installation) and
update.

I ran across tools from Aeolus: 
imagefactory - http://www.aeolusproject.org/imagefactory.html
and Oz - http://www.aeolusproject.org/oz.html

I noticed Oz is used in Heat too. 
Is there some other tool I could look at?

Thanks,
Tomas