Since the new clue up at the ATT site is probably a Rubik's cube type puzze, I thought I would share this information. The center color of each side is the face color of that side...so if you have a blue center cube, then that is the blue side (easy enough). Now, on the original Rubik's cubes this is how the cube was set up...the blue center was always opposite green; red was opposite orange; and, yellow was opposite white. So, if you have the blue on top--red would be on the left side and yellow would be on the right.
The cubes that are sold today are usually different. The blue is opposite white; green is opposite yellow; and, red is opposite orange. (Notice green and white have switched places).
In looking at the puzzles on the website, I do believe that MS is using 'ye olde style' of Rubik's cube. Hope that helps!