updated 12:00 pm EDT, Thu June 23, 2011 by MacNN Staff ThinkGeek is offering an AC outlet that doubles as a USB charger. The Fastmac U-Socket incorporates two USB connectors into a standard two-plug AC outlet. Using it, any USB powered device, including an iPhone 4, can be connected and charged without a dedicated adapter.The U-Socket embeds two five-volt 2.1 amp powered USB ports alongside two 11