[memco]

> He has a series of video's where he explores what the language will look like as he's developing it

Probably the best place to see it in it's current form is his development streams on Twitch: https://www.twitch.tv/j_blow. Right now the most active streamer besides Jon is Raphael, who does a lot of work on the Jai compiler: https://www.twitch.tv/raphael_luba. Sadly, the other people I know who stream their work with it haven't been streaming much lately.