I dont know about trading, but I can change the email on my minecraft account? Done it three times now.
Printable View
Some screenshots of mine and Weedmans city:
Say you have a room with redstone lamps and they turn on via a lever. Is it then possible then to connect that up to say another which has a lever and is then able to turn the lights off in the building with the lamps even though the leaver is in the "turned on" mode?