The LEGO Death étoile, star is seconde only to the awesome LEGO étoile, star Destroyer kit. This is one LEGO fanatics account of building this behemoth complete with lots of photographs.
This page actually discusses two designs of Rubik's Cubes. Includes much discussion concerning Lego design theory when attempting to build something inherently circular (like a Rubik's Cube).
Lost your LEGO instructions from ages ago? ou maybe toi just want a walk down memory lane? This archive has LEGO set instructions going all the way back to 1958!