We've started experimenting with Push in Jot Messenger and understand it a lot better now. Interestingly, Web-Push is still not supported by iOS and can only be implemented via native apps. Notifications update in UNA and Dolphin is the most important update we have on the roadmap, and now that we've learned more about the technology we shoudl be able to implement it reasonably efficiently.
Ok. IMHO native app with push - it's very not bad idea, simple to user and efficient. It was in Dolphin (poore one, need to say) why not to adapt it to una? But, please, don't cut Wall from there, as from Dolphin's one.