It's not great but links or elinks (or linx?) in a shell works "fine" for viewing the text of posts, reading the forum (albeit: slowly) and writing short replies.
Right now, given that there are other things we need to do, this isn't officially on our radar. EDIT: Or, if it is, it's pretty low on the list.
I know that ulterior has done some work on this front, basically either simple database queries or a telnet interface, but at that point, just install linux on something, ssh/telnet in to that and use links.