Oracle's New Supercomputer Has 1,060 Raspberry Pis
tomshardware.com
tomshardware.com
Honestly that's a totally valid reason to make something like this. This is super cool.
If anyone at the conference can sneak a peak at the PSU brand / model number, that would be great!
In my tiny 4 Pi cluster I'm using a regular 1U server PSU. It supplies 5v and can easily supply the current needed for the four Pis.