There's not currently a way to force an console fb mode with kms. The problem is the kernel fb interface doesn't really have the concept of multiple monitors, so if you want to force a mode, which monitor do you force it on, etc.
That is a great point. Speaking of KMS multimonitor support, How is that progress coming? Is anybody working on that yet? Also if you have a VT on monitor 1 and a different VT on monitor 2 how will the system know which terminal to bind the keyboard and mouse to? Will some sort of kernel input handler have to be written too?