With Apple’s new iPhone 3G scheduled to go on sale worldwide this Friday, Nielsen Mobile released penetration, demographics, and usage data for the current iPhone:

How many iPhones are already out there?

-Nielsen Mobile estimates that there are 2.3 million U.S. mobile subscribers using an iPhone
-The iPhone accounts for 1% of all embedded mobile phone users in the U.S.

Who is using the iPhone already?

-Two-thirds (67%) of U.S. iPhone users are male (compared to 48% of all mobile subscribers)
-55% of iPhone owners are under the age of 35 (compared to 34% of all mobile subscribers)
-iPhone users tend to be more affluent with 63% earning above $75k (compared to 38% of all mobile subscribers)

How do iPhone users consume mobile media differently?

-37% of iPhone users watch video on their phone (making them 10 times as likely as the average mobile consumer)
-82% access the internet over their phone (making them 5 times as likely as the average mobile consumer)
-17% stream music over their phone (making them 7 times as likely as the average mobile consumer)
-20% play online games on their phone (making them 9 times as likely as the average mobile consumer)

Read the full media alert.