LarryEllison

How do Russia's billionaires stack up against America's home grown oligarchs? To find out, we took a peek at some of the richest men in the world -- on both sides of the Arctic Ocean.

Last week's most puzzling moves included Bank of America turning ingrate on its debit card users -- who also pay taxes, and hence bailed BoA out -- Oracle's Larry Ellison and HP writing a new chapter in their feud, Warren Buffett opting for a stock buyback, and Sony refusing to pay for 3-D glasses.

The nation's wealthiest are worth a combined $1.53 trillion, according to Forbes. And while there are many familiar faces on this year's list of the richest Americans, a younger group of entrepreneurs are marching their way up the ranks.

Now that Oracle CEO Larry Ellison has HP's Mark Hurd, he could be getting ready to make his next move -- and go for all of HP. Sounds crazy, but at least one respected tech analyst thinks it'll happen. And he notes that Ellison is used to winning.