'bout 6 hours a night Sunday -> Thursday, Friday + Saturday vary, 8-9 hours ('cuz the kids are finally sleeping in late). Spend too much time glued to this monitor and a Telnet session.
a lot of nocturnal people here then if everyone sleeps x hours a day. Most people tend to sleep at night
Anyway, normally around 6-8 hours a day (I do sleep in the daytime and be awake at night) but I often only manage to fit in 6 days in a week - my days consist of between 28 and 36 hours.
Go to sleep around 12ish and wake up around 8. Anything less and i feel shitty. On the weekends and holidays i normally go to bed at around 5am and wake up at 2pm :P