It's not going to happen. I know a user or two have hooked up their ps3 or Xbox controllers to their computers and assigned keys to buttons, but that's about as far as blockland will ever get to, in regards to console gaming.
Or if you would be able to click the select (sometimes called back) button and it will pup open a players list, then to the left or right it would say,
[build mode]
[custom mode] being that you could choose what items to have, or [mini-games]
[free/roam mode] being that you could have nothing
something i have though of before but for xbox or steambox