Acer has officially unleashed its Iconia Tab A500, a 10.1-inch tablet poised to defy the likes of Best Buy has opened preorders online today while in-store preorders will start on April 14. The device will launch on April 24. Pricing starts at $449.99 while accessories such as a full-sized Bluetooth keyboard, a dock with an IR remote, a protective case, and a power adapter set with four connectors are an extra $30 to $70.