Great work, finally!!
Edit: oh wait, will this add to a new blog entry visible on the likes of Steemit or something like that?
Edit 2: Nevermind, figured it out :) this is awesome to bring over existing communities / chat groups from anyone's telegram / whatsapp. I think it's okay in some ways for it to be like a glassroom.
Feedback: Ok in most cases, people chat with quick successive one-liners. Since the Steem protocol has that 20 seconds / comment limit, I think it might be possible to make it a smoother experience by grouping multiple one-liners after the first before posting it on the blockchain.
For example: I typed this and pressed enter --> this gets posted into the chain, hence begins the 20-seconds timer before the next comment is possible. So in this timeframe, any text entries will be grouped and posted as one larger comment by the end of the time limit.
RE: Introducing Mangosteem - Steem Powered Web Chat