I did, and I'm hopeful, but Emacs uses quite a few key combos, and in my experience some of them might not work as expected. I have an LG Rolly keyboard, and while almost all key combos work, a few really important ones do not. If I remember correctly Alt-X does not work for some reason, it sends a totally different key code. I need to use ESC x which is slower and tends to return to the home screen. As a result, I do use it much less than I hoped I would. Actually, I think I haven't used it for a year...
So, until I can test it, I just hope that the keyboard on the Pro1 works for emacs ;)