Apple Inc. (NASDAQ:AAPL) social networking service Ping has hit 1 million users within 2 days. Apple iTunes has about 160 million account holders with credit cards. There are a lot of users that do not have credit cards tied to their account too.
About one-third of people who have downloaded iTunes 10 also signed up for Ping too. The Google Buzz social network saw tens of millions of users in two days as well. Google Buzz has about 170 million users.
Signing up for Ping is very easy, but building your social network is challenging. To add friends, you have to manually search for names. Artists can be followed on iTunes as well. Artists can post photos and messages on iTunes.