The number of emails from retailers that were opened via a mobile device nearly doubled between the fourth-quarter of 2010 and the second half of 2011 for a total of 28.1 percent, according to a new report from Knotice.

Retail giant IKEA is establishing itself in the mobile space via an integrated campaign that not only drives consumers to its locations, but also helps build the company’s email and SMS database.

The Dealmap is providing a resource for consumers to find and share local deals via a new application available in Apple’s App Store.

While any nascent marketing medium is as much about the journey as it is about reaching a destination, it is safe to say that in 2010, mobile marketing will reach a tipping point.

MixMobi has launched a mobile coupon platform that lets retailers use text messaging, RSS, email and social media networks such as Twitter and Facebook to create offers and send them to all mobile devices.

How do you turn a common short code, keyword and message into a viable marketing campaign?

That question should be legitimate to ask as more retailers such as fast food giants Pizza Hut and Papa John’s generate record sales from mobile customers.

British automotive retailer Mitchell Group used SMS and email marketing to drive sales up to $1.64 million in just one weekend.