The Nexus 7, the highly-anticipated Android tablet Google was reviewed by the Wall Street Journal. The 7-inch tablet, considered the biggest rival to Apple's iPad tablet, began shipping in the UK and is expected to arrive in stores in the United States in the next week. Staples has a pre-order listing for the tablet on its website, promising that the Nexus 7 will be delivered sometime between July 12th and the 17th, according to Slash Gear. Staples is offering $25 credit to spend on Google Pl...