I have pulled a few all nighters last semester, but since the libraries at my school do not open 24/7 unless during exam time, I was discouraged from doing too much of it throughout the semester.
At the beginning of last semester, I did try polyphasic sleep, merely out of curiosity since the academic load was quite light at the time. It did work for a bit and I was able to function normally on less than 4 hrs of sleep a day however, the sleep pattern did not fit my schedule so I had to give that up.
It's been 2 weeks into this semester, I haven't pulled any all nighters yet but have stayed up late almost everyday. I stayed up the first week doing a work term report, the second week I'm staying up to keep up with classes (2 weeks of material) because I haven't done any of those the first week. I have a part time job at the university that requires me to put 7-8 hours a week. On top of that I am programming this data collection mechanism for a research project which is expected to take up 15-20 hours of my time over the next 2 weeks.
So it looks like I'll be staying up quite often throughout the semester, anyone know how sustainable this is?