Media uploads work in Pubstrate now. Sort of, anyway. There's no fancy processing system like in MediaGoblin. Also, due to limitations in the Guile builtin web server, unfortunately the entire media file is copied into memory while saving. This can be remedied with a web server built on top of Fibers or 8sync which knows to pass in ports. (Now that I think about it, maybe this can be done even with the vanilla Guile webserver...)

I showed an image of video/image posts in Pubstrate previously, but it was linking to external media.

I guess probably nobody thinks this is exciting, but I did have to sort my way through releasing guile-webutils to get this to work, since I needed a multipart message parser.