Good questions
> Did that effort get cancelled or am I just not finding the info?
I've paired the focus down to Dat, yes. IPFS is still supported but Dat's my main focus. I may write a post later.
> the Mainline BitTorrent DHT, or just a different instance of it, operating on the same principles?
Yes, the Mainline DHT.
> How are you resilient against sybil attacks?
Dat sites are singly-owned and signed by private keys. The DHT network has all the same issues that BitTorrent has always had [1]. We use fallback networks that are less distributed (a custom DNS server) but we'll need to evolve that solution
> Did you end up forking Electron?
No, thankfully! I've been working with GitHub via PRs. They added the feature most needed so far, proper process-level sandboxing, so hopefully a fork won't be necessary.
1 https://security.stackexchange.com/questions/80933/how-can-t...