I personally find multiple monitors to be very distracting, in fact I get headaches and dizziness when sitting with someone with 2 or more monitors. I'm so used to a single monitor that the fact the mouse cursor doesn't stop at the edge of the screen and goes on to the other one is extremely disorienting. Now, I'm sure I could get used to 2 monitors, and I'm just stuck in my ways, but for my current workflow I don't see the benefit. I'm distracted enough as it is by emails/chats.