@evan can I interest you int he topic of contributing to open source software? 😉
For real though: federation is hugely complex to build well and in a way that degrades gracefully and is intuitive to the user. Taking all that on, as a solo developer, while also building out pretalx, would probably do the project a disservice.
Pretalx *does* have a plugin API though, so a federation plugin would be totally possible!