JupiterResearch predicts that advertisers will double spending on messaging and display ads for mobile devices over the next five years, reports InternetWeek. The market research firm projects spending by advertisers to increase to $2.9 billion in 2001, up from $1.4 billion this year.

Currently, just 22 percent of online advertisers are engaged in mobile marketing, including wireless carriers, automotive companies, CPGs and food services.

But the research also indicates the market might not be ready for the additional advertising, with consumers expressing concern over incessant interruptions, issues of privacy and the cost of commercial text messages.

According to ClickZ, the Jupiter report says: "Among the 78 percent of mobile subscribers that are aware of commercial SMS, 28 percent are concerned about getting charged for SMS messages and 21 percent are concerned about receiving SMS SPAM."

Recently, Enpocket's Mike Baker shared this advice for approaching mobile marketing.

In other recent mobile news, Ask.com recently announced they were entering the mobile search arena and a study found that user-generated mobile video is sharply increasing.