Re: Sage anyone?
There is a lot of great software out there. The idea of PelicanHPC is to be a tool for applied research, and not so much for learning. The CD image is made by running a script, and people who need other software packages can learn to use the script to make their own version with the packages they need. I expect that people who are able to use MPI in their work will be able to use the script without too much trouble.
This is not to say that educational tools aren't needed. For a while, with ParallelKnoppix, I was attempting to provide a tool with more of an educational focus. Now I have reduced the ambition level, to focus on making a productive and flexible research tool.
Sage looks like an interesting package. If it were available for Debian, it would be easy to include it in PelicanHPC. I personally won't be taking that on, though, for the reason noted above.