Next up, Meyer predicts, is an explosion of cellphone services in developing areas. His own company, Voxiva, has phone-based programs that help health officials track diseases, among other things. And another speaker, Daniel Annarose, described how cellphones are already helping Senegalese farmers earn a fair wage. Annarose's company, Manobi, sends farmers text messages that list the market price of their crops, so they no longer have to rely solely on the word of the middlemen who buy their goods and then sell them for a much higher price. Manobi sends out 30,000 text messages a day, Annarose said, and many farmers have doubled their income.