Memex is not able to do cross-browser/device yet, but we are short before releasing our mobile apps for iOS and Android, as well as syncing between devices.
Enjoy :)
Memex App will be a dedicated app that in its MVP works just like Pocket, except that you can also add notes, lists, favorites and lists when you save content.
In the MVP+ you can also search your knowledge on the go and do annotations on the go.
I believe it shut down shortly after being acquired by Yahoo and appears inop today. There may be a decent alternative out there but my system for bookmarking things in that way died with their service, sadly.
glad you bring that up :) After we are finished with the current work on making Memex more stable and user friendly, we are working on shareable collections. With that you can share lists of websites, papers, notes and annotations with your peers, or co-curate those collections together.
Both projects took the inspiration for the name from the same thing though: https://en.wikipedia.org/wiki/Memex
I will give this a spin, on paper it looks like what I need.