Ben, thanks for the info.

I have some questions about the Thumby system specs.  In addition to the specs in https://www.kickstarter.com/projects/kenburns/thumby-the-tiny-playable-keychain and https://www.arm.com/blogs/blueprint/raspberry-pi-rp2040:

What is the boot medium? Flash? Is this on-board or an exernal flash?

How much RAM is onboard the RP2040? I assume there is no external RAM, is that true?

The spec says "Memory: 2MB total storage". How is this broken down?

Is there any  crpyto acceleration hardware on the RP2040?

Thanks!