Since its creation in 2004, Facebook has become the world's most trafficked site. It hit the 500 million member mark in July and may have already passed 600 million.

If you're like me and have trouble wrapping you head around those numbers, here is some perspective: According to Likeable Media, there are 207 million distinct websites in the world. There are more than twice as many Facebook users as there are actual websites. If you wanted to travel 500 million miles, you would have to circle the Earth 603 times.

It didn't take long for companies to sign up and join the crowd. Here a look at the 10 most popular businesses on Facebook as of December 14, 2010. The humble Oreo still has a lot of fans.

24,833,005 fans

20,741,467 fans

18,827,194 fans

15,889,721 fans

15,033,867 fans

14,323,207 fans

14,137,775 fans

12,403,166 fans