Jens revealed some new details about the new additions in the upcoming Minecraft update.
Via twitter Jens revealed that the new block will be a sandstone hieroglyph block. The texture has been part of the game since Minecraft 1.2 but had not been used up until this point.
The specific recipe has not been released but Jens has revealed a few details about the block. The crafting of the new block will not involve the furnace and instead utilize the crafting table.
The new block will be available in both creative and survival mode.