This may be an old suggestion, but I think a smartphone app would be great. I find it difficult to communicate and reply to the tweet updates that we receive on our phones. I end up forgetting to reply to it and the subject dies off or I try to reply to a message I received on a forum and it has to take me to an external link and then the page displays really small.
So those are my main complaints without an app, but i wanted to share this with everyone. I myself, have no idea what goes into developing an app but I love testing them, so if anyone has a technology thumb then maybe we could have something here.