Believe it or not, there's a potentially cheaper (and more customizable) way to get NVIDIA's quad-core Tegra 3 into your life than to spring for a Nexus 7. Kontron is readying a rare Mini-ITX motherboard, the KTT30, that combines the ARM-based chip with expandable RAM and a trio of mini PCI Express slots for expansion like a micro SATA drive or a 3G modem. The external ports are more the kind you'd find on a do-it-yourself x86 PC, too: full-size HDMI, USB an