Regrading the conversation not working anymore, I can't do anything else, the old conversation API has been stop working together with the retirement of Twitter API 1.0 (early June). For the new conversation API, they have restrict it for only used by their authorized (official) apps. Anyway, Twitter never have plan for making the conversation API for public use anyway.

I will still continue support Tweetian, but passively. That's means only critical update but no new features. This is because Tweetian is powered by JavaScript backend which making it very hard to maintain. A complete rewrite the backend in C++ wil require too much effort. Another reason is the Twitter API becoming more strict which discourage me to continue developing.