Just shooting an idea to developers: since most of the events are locked in Facebook, what about a page where people could enter the (public) event url and a script makes all the data available in ical/json or whatever opendata format? At every call it caches the data into a db (IPFS?) and makes it available also on Mobilizon!
Even better making it working also on-the-fly simply passing the ID with the url:
This could be also integrated into a Chrome/Firefox extension so users could be the input to build a mirror database in short time, just navigating their fb profiles!