I personally feel that eternal day in town would be very nice. I have been building at 3110 with black stained glass recently, and it is so miserable to work with, even with gamma turned on 15/night vision potions it is so miserable I have to wait for day. Yes, this does mean that daylight sensors will not work, so maybe add a command to turn perma-day on. Perhaps /day, /night, and /normal. Something of the sort would be greatly appreciated. I am sure it can be done, I have seen in on some survival games servers. Please leave comments or constructive criticism if you want to improve the idea.