Coffee chain Starbucks says it has processed more than 20 million mobile payments from its Starbucks Mobile Pay apps, which are available on iPhone, Android and BlackBerry. The scheme launched in January at 9,000 cafes around the US, and involves people paying for their drinks by scanning 2D barcodes from the app at the checkout. “The number of mobile payment transactions increases every month,” VP Adam Brotman tells VentureBeat, adding that more than one million smartphones have at least one registered Starbucks Card now.

Meanwhile, eBay CEO John Donahoe says his company expects the value of goods bought from eBay’s mobile apps and sites to top $5 billion in 2011, while its payments subsidiary PayPal will handle more than $3.5 billion of mobile payments this year too. eBay’s mobile apps have now racked up more than 56 million downloads. “Our perspective on mobile is that it’s not incremental, it is another screen in the shopping experience,” he told the Open Mobile Summit. “It’s a consumer that is coming back more frequently and shopping more because now it can be done at any time of the day.”