Hmm, disappeared off twitter... most recent tag of note is him signing the CTV petition

Looks like he put out this vaporware nonsense post last year about "Brollups", the domain for the project seems parked now: https://www.nobsbitcoin.com/brollups-bitcoin-native-rollup-design/

Interestingly that was only a few weeks after re-arranging the deck chairs on the titantic re: Ark