Peter follows these people on Refind.

Derek Sivers
Writer, programmer, avid student of life. Please email instead of tweet at me : https://sivers.org/contact
Sam Altman
Twitter advice: He who fights with monsters should be careful lest he thereby become a monster.
Martin Fowler
Programmer, Loud Mouth, ThoughtWorker
Kelly Sommers
4x Windows Azure MVP & Former 2x DataStax MVP for Apache Cassandra, Backend brat, big data, distributed diva. Relentless learner. I void warranties.