Castopod has been implementing ActivityPub for more than 16 months! 🚀
Castopod also has the <podcast:socialInteract> tag, allowing ANY app to join the conversation! 💬
With Castopod, your podcast IS your social network: there is no one between your podcast and your audience. ✊

(Thank you @tim@masto.aow.show @dave @adam for reminding that. 🙏)