I presented a bit of my personal project during our get together today.
This will ultimately become a driver in the P2 Object Exchange after it's working well enough that many of us can use it.
I'm posting this here so anyone can comment.
My git repo ironsheep/p2-LED-Matrix-Driver
will be where I publish the status of the project as I make progress.
Once you visit the repo page (which has detailed pictures, project intent, and findings...) you'll see that it also involves a HUB75 hardware adaptor board for our P2 eval board or the new P2 Edge eval board.
No, I'm not sure yet how I'll make these boards available for purchase but it will eventually happen.