I doubt that is doable. There are only two ways I know of for getting FFXIV 1.x on multiple monitors: (1) use Eyefinity or some similar GPU technology to create one large virtual monitor out of several distinct physical monitors that can be arranged into a perfect rectangle. This could be done in fullscreen mode, but wouldn't work as the USB monitor has a lower resolution even if your GPU supports this technology. (2) Use windowed mode and manually position the monitor so that certain parts of the game window are on certain monitors. Apart from looking a bit ugly, I don't see how this would work without cutting off large portions of the game window that aren't on either of the two monitors.

In 2.0? Who knows! We may be able to use our smartphones or other external clients for some gameplay tasks, perhaps even chat. Then you could use a UI mod (which will be possible in 2.0) to remove the chat windows altogether.

Hope that helps. I can try to explain a little better if some of that was unclear. It seemed a bit convoluted to me.