Google has made an interesting new acquisition that suggests it may be attacking Amazon's shipping business. It just bought BufferBox Inc, a Y Combinator startup, for an undisclosed sum. BufferBox is a kiosk that can be placed in local venues around the nation for self-service parcel pick-up. In other words, if BufferBox becomes popular, you could walk into your local CVS and pick up a package you ordered from an online merchant.