Similar to what someone may have asked for on an earlier thread, I think it would be cool to add a draft function. However, my idea not only involves saving one's own work to complete at a later date, but also involves this function for responding to posts on forum threads.
I came up with the question because I often can't respond to threads on my phone, but I can on my Ipod. If there was a draft function, maybe that could change (unless I'm just doing something wrong).