I'd like for the observable community to finally settle on a minimal common interface (like Promises/A+ and later ES6 promises did) for observables. Maybe https://github.com/zenparsing/es-observable
Then maybe cycle.js could come with a more minimal implementation rather than having to bring in a library with a gigantic footprint and 100+ operators (https://github.com/Reactive-Extensions/RxJS/blob/master/doc/...)