I'm pretty sure this has been abandoned. Hasn't had any updates in a really long time. "Latest commit bc97a26 on 12 Oct 2015".
One of the contributors recently wrote: maximk commented on 25 May "All recent updates to the code were customer-driven. New users mean new updates. The likely application area for this is NFV, modular software for telecoms. No definite plans"
It's not abandoned AFAIK, it's a small team that does consulting and they have to prioritise work for customers. When that coincides with Ling they can make progress. I've heard this from more than one unikernel/LibOS project.
I have seen this, and some of their blogposts have been quite intriguing, but I haven't seen much recently. Additionally, I have yet to see a guide to making and deploying a web application on it.
I'm not sure the second part of your question makes sense in the context of LING. It's a complete reimplementation of an Erlang emulator, not a derivative of BEAM.
That said, I've been working recently with Erlang on Rumprun precisely because I didn't want to rely on a totally unknown commodity (LING) in terms of implementation and behavioral semantics at the same time as drastically changing my operational semantics (unikernel deploy).
