Rings, cameras--now sex is latest phone feature | CNET News.com

"At present, sales of pornography over mobile phones in this country amount to virtually nothing. But cell phone commerce is on the rise, with sales of ring tones alone expected to reach $453 million this year, according to the Yankee Group, a research firm. The company estimates that by 2009, sales of pornography for phones will hit $196 million, still meager compared with a projected $1.2 billion for ring tones. "

[CNET]

Porno has drived popularity of new technologies like the VCR, online video (streaming), and is a major source of revenue for media companies - think pay-per-view. Interesting that pornography hasn't driven the rise of mobile data services.