Here's a Pubstrate screenshot, showing items in a feed. (It includes a little bit of a sappy micro-love-note. I was demo'ing to Morgan, sorry!) But the cool part is...

Here's a screenshot of soci-el, the emacs ActivityPub client I've been writing. The neat thing is that you see that on the right side, the *soci-compose* buffers I composed the messages from (yes, it's using org-mode, yes I'm using comments to hackily handle the "headers" section). These were then sent across the wire using the ActivityPub protocol. On the left side you can see my outbox rendered, also pulled down through the ActivityPub API.

Fun!