EBay confirmed that 2011 will be its largest mobile shopping season to date with an expected $5 billion in mobile sales, driven in part by the holidays.

EBay has partnered with designer Jonathan Adler to let consumers shop its new storefront and interactive store windows via their mobile devices.

The volume of payments made via PayPal from mobile devices will total more than $3.5 billion in 2011, with the company expecting a significant jump in mobile payments during the upcoming holiday shopping season.

EBay’s StubHub has teamed up with Sprint to let fans buy and sell tickets to college and pro football games via their mobile devices.

Mobile will play a big role for eBay as it migrates to an open ecommerce ecosystem that will enable developers to create new services and apps that enhance online and mobile shopping.

A new original video series from eBay will appear in the eBay Motors application as well as on the brand’s Web site to drive engagement and sales.

While PayPal provided some more color around its push into mobile payments last week, a lot of details are still missing, such as how it will enable in-store payments.

EBay has rolled out a “When it’s on your mind, it’s on eBay” advertising campaign that targets on-demand consumers who prefer to shop anywhere and anytime via their mobile device.

M-Qube is suing Zong for patent infringement in the U.S. District Court for the Central District of California over a mobile trigger messaging system.

EBay said mobile is accelerating thanks in part to PayPal’s growth, with the division posting its first billion-dollar revenue quarter.