Freenode IRC is a good place to hang out and chat with them at #coreboot and #libreboot.
You might also be interested in learning about micro-code, which acts like a bit of hardware but is really software used to add some functionality to a CPU for example. Sometimes it can be updated. Intel use proprietary micro-code, unfortunately.
If you want to look at mobile devices, then the shockingly small ReplicantOS community is a place to look: