Augen GenTouch-78 E-Book Reader 7" Tablet with Android OS for $149.00 shipped.  Here is a screenshot for your reference.  This tablet features a 7" touchscreen LCD with 800 x 480 resolution, 2GB memory, SD/MMC expansion slot, Android 2.1 OS, Wi-Fi network connectivity, and is measured 7.36" x 4.65" x 0.63".  Most places have it for about $179.