The flying hack isn't under Notch's control, therefore he can't implement rules for it. He will probably and prevention for it though eventually. However he has stated he will never add a noclip/flying into the game.
More blocks will probably come in the future, however the game is still in alpha stages so far, be patient.
lol Zuriki your always quick to reply, i like that. yeah, im just gunna give up on the whole fact it would be nice for admins to have more ability (especially local host admins). i just like keeping my visitors happy and makes janitor work easier.
EDIT: YAY FOR 3X3 SUPERSAMPLE AA WITH NHANCER
EDIT: scratch that, this is opengl not d3d. change settings