Today's set is 4886 - Building Bonanza.
"Now wait a minute," you might say, "that's not microscale!" Well, yes and no. The main model isn't (if anything it's large than minifig scale). However, this set is from the Creator line. This line is not so much about creating one main model, but about providing many pieces with instructions and inspirational pictures to make many different models. If you go through the instructions, you will see that the "ideas" (models without full instructions) are at various scales. Thanks to zFERRY for building and posting pictures of the various ideas, including these two smaller scale creations.
Set 4886 on Brickset and Lugnet. Inventory on Peeron. Instructions on BrickFactory.