PDA's like the Blackberry have been making strong inroads into the e-mail world. However it seems more possible now that some and perhaps much of this market will be taken over by cell phones. Vodaphone has issued a new service in Europe, and Rogers is considering one in Canada. If this happens, it will make serious competition for PDA's e-mail, simply because many more people have cell phones than PDA's. InformationWeek Weblog