I am browsing The Register and run into this article.

Apparently, songwriters have found a lucrative market. To sell you new ringtones...

Even though there are many hurdles to overcome - such as battery life and network speeds - the report's authors predict that the ringtone market is likely to pave the way for the eventual take-up of more elaborate mobile music.

Indeed, they claim this growing area could prove to be a neat fit for both the music and mobile phone industries.
Now we can look forward to "Hit Me Baby One More Time" in the theater, classroom, public transportation....