Billionaires in the making These days everybody's talking about this youngest self-made billionaire. But check out some of the talented folks who are hot on his heels. Jay-Z Part owner of this NBA team, he's got a clothing line and is co-founder of a record company. Add his superstar wife, and they are one of the top-earning couples around. It won't be long before he adds "billionaire" to his list of accomplishments. Mark Pincus Never heard of Zynga? If you're on the top social networking site, you definitely know the company's games, which include "Mafia Wars" and an über-popular game. CEO Mark Pincus attended an Ivy League institution and is on his way to achieving billionaire status. Michael Jordan This retired basketball player is an example of how being a brand can be extremely lucrative. How much does he make per year in endorsements alone? The baller legend is also a majority owner of this league team and this motorcycling club....