I ordered this about a month ago; the backpack and mouse were not in the description when I looked at it, but they did come with it (which was a pleasant surprise). So, I believe they do still come with it, despite not being included in the description.
I ordered mine in mid-June 2012, and it came with mouse & backpack. The section titled "Product Description" still says "Bag and Mouse" too. If you're going by "What's in the Box" I think they are describing the retail box (foam padding + laptop + power supply) versus the extras you get in the Amazon shipping box.