Move over Raspberry Pi, here is a $4, coin-sized, open-source Linux computer(ZDNet)
ZDNet takesa look at the VoCore2, a coin-sized computer. "VoCore2 is an open source Linux computer and a fully-functional wireless router that is smaller than a coin. It can also act as a VPN gateway for a network, an AirPlay station to play lossless music, a private cloud to store your photos, video, and code, and much more.The Lite version of the VoCore2 features a 580MHz MT7688AN MediaTek system on chip (SoC), 64MB of DDR2 RAM, 8MB of NOR storage, and a single antenna slot for Wi-Fi that supports 150Mbps."