Last year I stayed up for 54 hours straight after getting a total of about eight hours of sleep in the preceding five days. Engineering can be a bitch sometimes.
After handing in my last assignment, I went to the pub, got drunk (or drunk enough, considering how long I'd been up), hopped on a bus out of town, immediately passed out and was REALLY disoriented when we got to where we were going.
As a note here, on the Clock Crew forums they used to have an annual event where people would try to stay up for 100 consecutive hours every summer. Every year at least a handful of people managed to do it. I think if you set a goal for yourself you'd be able to stay up a lot longer than if you just leave it indefinite the way you did here.