Can I set the schedule for automatic Market updates, e.g. every night? Is there a way to schedule when the Market updates my installed apps? Ideally I would like to run it late every night, that way I won't have to be bothered with them when I'm actually using the phone.
I'm not 100% sure but maybe tasker can do it. If it can't do it directly and if you are rooted, you can use  tasker to kill Market except on night time. That way at night time Market will run and install your apps. At day time market will get killed and no installing of apps.