Can 27-year-old 4Info founder Zaw Thet's mobile ads keep Yahoo independent and save Yahoo CEO Jerry Yang's job? No. But 4Info can help Yahoo make money texting users with updates from Yahoo news, horoscopes, sports scores and weather forecasts. Today 4Info and Yahoo announced a trial partnership to split revenues earned by ads 4Info will serve against Yahoo content sent via SMS messages to users who have signed up for updates.

Nokia is leaping into the mobile advertising arena with its plans to acquire Enpocket, which sprinkles mobile Web pages with video and banner ads. With mobile phones seen as one of the great unmapped frontiers of advertising, Nokia is preparing to battle with other prospectors like AOL's Third Screen Media and Google, which just announced AdSense for Mobile. Of course the big problem, as Advertising Age points out, is that consumers are hardly begging for ads on their phones' cramped screens. But advertisers are attached to the long-held vision of location-based advertising, stalking their customers through the streets, pinging them with coupons for nearby stores.