Warren Buffett will try to make America laugh when he makes a guest appearance on NBC's "The Office" as a potential replacement for lead character Michael Scott, played by Steve Carell.NEW YORK (CNNMoney) -- Billionaire investor Warren Buffett will be making a cameo appearance on "The Office," playing a potential replacement for the dim-witted manager played by Steve Carell on the NBC situation comedy.An NBC spokeswoman said Buffett will play one of several potential replacements for Michael Scott, the incompetent office manager played by Carell. On "The Office," Carell's character, Michael Scott, has decided to ... (full story)