We've seen these forecasts go back and forth, so why not throw in another one? MediaPost reports that according to a new forecast by ABI Research, mobile marketing will grow to over $24 billion worldwide in 2013 from just $1.8 billion in 2007:

"The expansion will be driven by new ad-supported platforms including mobile search, video and gaming. The report found that over the last year, advertisers have come to embrace mobile marketing as a key part of cross-media branding campaigns."

Naturally, ABI also warned that the nascent mobile market is still a "Wild West" environment that will take time to develop, according to the article. We assume that's a nod to recent reports in the maybe-we're-all-wrong category.

Forecast: Mobile Marketing Will Soar In Next Five Years [MediaPost]