As I mentioned in September, Billboard is launching a ringtones chart in U.S…News.com has some more details.

The new listing, which debuts in the Nov. 6 issue, reflects the “growth, innovation and success of the rapidly growing mobile music market,” Billboard said in a statement Tuesday. The “Hot Ringtones” chart will list the top 20 selling ring tones for each week. It will be based on sales of polyphonic, or “real music,” ring tones compiled primary from U.S.-based providers, Billboard said.

The data for the Billboard Hot Ringtones chart is compiled from the primary providers of the US market including 9Squared, AG Interactive, Dwango Wireless, Faith West, Infospace Mobile, Kanematsu, Zingy and Ztango…some more details here...