[galaxy-dev] galaxy deployment workflow or best-practices

I looked at the Galaxy deployment presentation from the Galaxy Community Conference ( http://wiki.g2.bx.psu.edu/GCC2011?action=AttachFile&do=view&target=GalaxyDeploymentandAPI.pdf ) and it was really helpful. I am wondering if you could share any details or best practices for maintaing the galaxy install base. For example, do you use any build-deploy tools or workflow for updating the galaxy install?? Any comments or suggestions on this will be really helpful. -- Thanks, Shantanu.