Mobile app. I'd even pay for one and I am sure many feel the same. Getting notifications and being able to easily navigate to and respond to messages and threads. I believe the jsp userbase is large enough to make this a viable product as well, so from a business standpoint it might actually be a sound idea. JSP is one of the reasons why D2r is worth playing. The community is engaging. App would be amazing and could incorporate other security features such as 2fa - you know, the basic features that people would probably be willing to spend a few bucks on.