I finally received a small run of boards (20) from PCBWay and I've listed them on Tindie!

You can order from the product page, here: https://www.tindie.com/products/jeremy/thunderpack-18650/

What Next

I'm playing with a couple more prototypes for the next version of the board. Here are some of the things I'm thinking about:

• On-board flash memory: The base STM32 chip has about 512kb of memory, but CircuitPython uses most of this for the runtime. An external flash chip will allow larger CP programs or it can be used for logging or to create a USB MSD.
  • I have an open PR to boost the user program flash memory a bit for the current board.
• New flat board with external battery: The original form factor works well in many cases, but sometimes you need something flatter/smaller. I'm working on an alternative form factor which uses an external battery. It should retain the same basic features.
• Flexible LED PCBs: Loosely inspired by Adafruit's LED Collar, I've been playing with flexible PCBs from OSHPark to make DIY LED strips that mate directly with the thunderpack board. This has some great wearable applications.
• Shorter Board, Same Power: Using a new switch I found on Aliexpress, I can reduce the length of the standard ThunderPack board by 4.5mm (~1/4 inch)

Stay tuned, I'll be posting more soon about these ideas.