Will the ubiquitous iPod become obsolete in the face of new cell phone technology? At least two companies are hoping so, as they gear up for the release of a major direct-to-phone music service next year. The companies, Napster and Ericsson, say the service will allow users to download music directly to their phones, or to transfer collections back and forth between the phone and a computer. Of course, phones are getting awfully bulky with features these days, what with all the cameras and games and ring tones and videos, and a lot of consumers still seem to want a phone that just makes phone calls, and an MP3 player that just plays music.