Net worth: Just under $1 billion
OK, we realize that Zuckerberg fell off the billionaire list this past year, but hey... this is the guy who launched Facebook from his Harvard dorm room. So we're keeping him on. In his own words, it started off as just a "Harvard-Thing," until Zuckerberg then decided to spread Facebook to other schools.
Net worth: $12 billion
Brin was born in Moscow, but immigrated to the United States when he was six. He met fellow Google co-founder Larry Page at Stanford where they "crammed their dormitory room with cheap computers" and tested their new search engine designs. When they realized they had created a superior engine for searching the web, they suspended their PhD studies to go full-time.
Net worth: $8.2 billion
This Swiss-Italian entrepreneur was born in Rome and his family moved to Switzerland in 1977. He graduated from Babson College in 1989, and earned an MBA at Harvard Business School in 1993. In 1998 Bertarelli inherited ownership of the pharmaceutical company his father founded, Serono. His net worth is currently $8.2 billion.
John de Mol
Net worth: $2.2 billion
John de Mol is a Dutch media tycoon. He's a well known personality in the Netherlands, acquiring his fortune producing television programs. In 1997-1999 he developed the highly popular reality television series Big Brother and later produced 1 vs. 100 and Deal or No Deal. His net worth is $2.2 billion.
Net worth: $2.5 billion
This "Guy" is the founder of Cirque du Soleil. Starting out as an accordion player, stilt walker and fire-eater, Laliberté left home at age 18 to hitchhike across Europe working as a street performer. Determined to succeed, he went on to create a combination of circus styles from around the world. Today his net worth is $2.5 billion.
Net worth: $19.5 billion
At the ripe age of 44, Mikhail is one of the top 50 richest people in the world. A Russian self-made billionaire, he is one of Russia's leading industrialists in the precious metals sector. Prokhorov is known throughout the world and especially in Russia for his lavish lifestyle. The Moscow News Weekly described him as "Russia's most eligible bachelor."
Net worth: $2.4 billion
At 59, we all hope to look as good as Branson. With his flamboyant and competitive style, his Virgin brand grew rapidly during the 1980s. In 1999 Branson was knighted for "services to entrepreneurship" and presented as a millennium icon. From politics to business to world record attempts, Branson has tried it all. His net worth is $2.4 billion.
Net worth: $16 billion
Bloomberg is the current Mayor of New York City -- although, he originates from Boston, MA. He is the founder and 88 owner of Bloomberg L.P., a financial software services company. He was frequently mentioned as a possible independent candidate for the 2008 presidential election and fueled that speculation when he left the Republican Party in June 2007. Not a bad looking guy at 67 years old -- his net worth is $16 billion.
Net worth: $12 billion
Larry Page is co-founder of Google, Inc. He grew up in Lansing, Michigan and later went on to Standford for graduate studies where he met Sergey Brin. In 2007, Page was cited by PC World as #1 on the list of the 50 most important people on the web, along with Brin. His net worth is $12 billion.
Net worth: $12.3 billion
Originally from Houston, Texas, Dell had his first encounter with a computer at the age of 15 when he pulled apart a new Apple II computer and rebuilt it for fun. With the help of a loan from his grandparents, Dell dropped out of college to run the computer company he launched from his dorm room, which later became Dell, Inc.