Recent instead of pre-installed dev software
Do not bother to pre-install dev software: Each developer will need a little bit different set and installation of software is easy and fast in ubuntu.
(e.g. in the blog post you list git and bzr, but I use svn and hg)
Instead, make sure the recent dev tools are available in the repositories. At the moment I use several PPAs to fetch recent dev tools. Maybe you could have one PPA for various DEV tools where tools are updated within a reasonable time frame.