Just in case the trend toward mobile advertising wasn't already clear, InfoWorld hits all the major reasons why we're headed for a huge increase in spending. They point to a study by Informa Telecoms & Media, which projects that spending will reach $1.5 billion this year, and $11 billion by 2011. Although some prior adventures in mobile ads have failed, one failure they highlight -- Spotcast Communications, in Hong Kong -- occurred in 1999, before phones were capable of properly displaying ads, much less showing content that people wanted to see. The technology has improved since then, and the ads are here to stay.

Mobile ads: The next Internet gold rush? (IDG via Infoworld)