PIBBSS definitely does some mech interp, and I believe AI safety camp has some mech interp projects.
For people looking for MATS-like programs in other locations, with different timelines, etc. this page is a great resource for finding other training programs, a number of which (PIBBSS, Pivotal, LASR Labs, others) include mech interp research: https://www.aisafety.com/map
Hello! Long-time lurker, planning to post research results on here in the near future. I'm a currently a PIBBSS research fellow, working on LLM interpretability relating to activation plateaus and deception probes. I'll be joining Anna Leshinskaya's Relational Cognition lab in the fall as a postdoc, working on moral reasoning in LLMs. Feel free to reach out if you have any ideas, questions, etc. on any of these topics!
Very glad to hear you're okay!
I've found this highly valuable. Doctors/nurses almost indubitably know more than I do, but also indubitably have way less time to obsessively stare at at scans and charts for hours on end.
And congrats on the wedding!