Okay, if this post makes it to the thread, making replies from the mobile interface officially works.
Good luck to us all!
Edit: Score.

Updating the original post with the good news.
Originally posted by: PlatinumGold
i just tried it on my Motorola Q, nice. will make browsing at forums on the road much much easier.
wondered why PM wasn't available?
The ability to view to private messages is now at least theoretically possible. Someone will need to come up with a parser for
this page, after which I can integrate it into the overall site and add the ability to reply. Any volunteers?
On my end of things, adjusting font sizes and the ability to post a new thread are next.