By the numbers | Sizing up a top advertising rival

[His nickname: "Zuck"]

From today's Wall Street Journal story about Facebook CEO Mark Zuckerberg's slow-mo plans to sell shares to the public. The twenty-something owns more than 25% of the giant social media company he started in a Harvard dorm room, the WSJ says. Other numbers:

2

in billions of dollars, possible 2010 revenue

3

board seats Zuckerberg controls

5

number of board members

10

in billions of dollars, Facebook's recent valuation

25

Zuckerberg's age

400

in millions, number of users

1,200

number of employees

2004

year Facebook founded

How many times a week to you visit Facebook? Please post your replies in the comments section, below. To e-mail confidentially, write jimhopkins[at]gmail[dot-com]; see Tipsters Anonymous Policy in the rail, upper right.