The longest I have ever gone without sleep was probably 19 hours. I don't think I would ever make it to 24 hours... :zzz:
I've heard story's and news reports of kids dying due to lack of sleep and playing games constantly. The longest I have done would probably be 5am to the next day at 10pm or so. I could do more but am a bit afraid of dying like some of these kids, and this I only do on holidays. When it's a school week i'll only stay up till 11pm or around there.