There's no single central development (aside from HW) effort, AFAIK. There are various individuals that work on particular aspects of the SoC/Phone support in t

There's no single central development (aside from HW) effort, AFAIK. There are various individuals that work on particular aspects of the SoC/Phone support in the Linux kernel with some cross-over with linux-sunxi community. And there are distribution/userspace efforts which I don't have much insight into, because I'm more focussed on the Linux kernel side of things. But from the edges it looks like a fairly small group of people pushing things forward. I got originally interested in Linux kernel programming through various Xunlong Orange Pi boards (probably since Linux 4.6 times), Allwinner tablets, etc. I spent some years on it, and got to know a good bunch of Allwinner SoCs, and Linux driver development quite well. So when PinePhone got announced with Allwinner A64 in it, I was immediately interested. Pine64 community founder then offered me the developer unit, after noticing my interest. That was the start of it. ;)