I'll try to be thorough in hopes of making it easier to answer my questions.
Basically, I have dual monitors mostly working with xrandr. They are both 1680x1050 monitors, except one is rotated 'left' so I'm using it in portrait mode. My virtual resolution then, is a rectangle of that is 2730x1680. This leaves dead zones above and below my landscape-oriented monitor, as it doesn't have as many vertical pixels as the virtual screen/portrait monitor.
My configuration is accomplished through the following lines in my ~/.Xprofile:
xrandr --output DVI-0 --left-of DVI-1 --auto --rotate left --pos 0x0
xrandr --output DVI-1 --auto --pos 1050x345
The deadzone is annoying, but it also seems as if my cursor is "stretched". It's like X doesn't know I'm using a bigger resolution, and is stuck using a cursor for a smaller resolution.
As for the deadzone, all solutions are welcome, but I was wondering:
Is there anything I could perhaps put in my openbox config to block that area from having windows placed in it? Something like the margins that are used, except on a per-monitor basis? Furthermore, is there any way to prevent my mouse from going into that region using openbox or X, or anything else?