Sorry – I couldn’t resist the headline. From the Pew Research Center … The share of adult internet users who have a profile on a social networking site has more than quadrupled in the past four years — from 8% in 2005 to 35% now. Beyond this impressive new figure are several other takeaways such as – personal use of social networking is currently more prevalent than professional use. This tracks pretty closely to the Forrester study from last week. You can read the complete findings of the Pew research here. How many profiles do you maintain and how do you use them?