Internet commerce juggernaut eBay is unveiling a brand new iPhone application dubbed Deals today, alongside an upgraded version of its shopping app for the iPhone and iPod Touch platform and an enhanced mobile website. And there's a good reason for eBay to bolster its mobile offering: the company says its mobile GMV (value of goods sold) via its iPhone app and mobile website ( m.ebay.com ) is on track to top half a billion dollars by the end of this year. Impressive number, and that's not the end of the story. eBay also shared that its mobile GMV is growing at a double-digit rate month-over-month, and that approximately half of its 750,000 unique mobile users per month are situated outside the United States. Another interesting tidbit: eBay says 1 item is purchased every 2 seconds through its mobile offering. Earlier this year, eBay CEO John Donahoe told a conference audience that the value of goods sold through the eBay iPhone app alone would exceed $400 million , and that an upgraded version of the app was imminent. That updated app should now be available, and it gained a little brother, too.