Yes, inspired by Progressive Automotive X PRIZE blog post Team Summit Day #1 - Teams Get Schooled in Competition PR and Social Media, here's another twitter list:
Progressive Automotive X PRIZE twitter list
It's also in the "list of twitter lists" on the top right of the Space Prizes blog main page. I have a few teams on the list, and some other twitter accounts that may be of interest to PIAXP followers. For example, I included @EVCUP - "Organising the first Electric Vehicle Racing Cup!"