The Disney Blog has a look at the new articulated buses now in use at Walt Disney World. The new buses add a lot more space for guests but not much space to actually sit down.
I thought Disney's transportation was really great on my last trip. Buses came reasonably fast and were convenient. I'd always gave my seat up to a parent with their hands full or a child so I rarely had a chance to sit down even after a long day at the parks. At least with these new buses your wait on the curb might be shorter.
Head over to The Disney Blog for a video tour of the new bus.