Filed under: Portable AudioEach week Ross Rubin contributes Switched On, a column about consumer technology.
If Lala.com has its way, the Web song will do to the MP3 file what the MP3 file did to the CD. The maverick music website, which began as a CD trading site and moved into Internet radio, announced an ambitious plan last year to license the catalogs of the four major music labels as well as those of many independents. It would provide unlimited listening to its members in the hopes of stimulating buying. Listeners would pay only when t