Originally posted by Mharr:

I doubt they'll be in a hurry to add a variation on something that's already right there in the game. Creative mode is probably in the cards at some point, but I wouldn't be surprised if that point was on or after 1.0 release.

There is already "creative mode" They call it debugmode

add "-cosole" to launch parameters in steam , start game , press F5, type devcommands, then type debugmode, close console, then press "B"

no bench requirement, no material requirements ... Z lets you fly (and build) , K is a "killall" command.

I should note this will not work on a dedicated server without mods. But it works just fine in single player in vanilla.

If you have any trouble use the internet , this is well documented