A still-ongoing eBay auction has validated suspicions that Apple has been testing 3G-capable Macs for years. The 2007-era MacBook Pro prototype, originally bought off of Craigslist for parts, has a built-in Dynastream ANT2USB modem modified to fit in the aluminum chassis. It includes not just the necessary SIM card slot for the HSPA 3G access but a retractable antenna that would sit flush with one corner of the display.
