In addition to Fortune's 40 Under 40 list, we're also keeping our eye on these 20 innovators, young guns from a wide range of industries and backgrounds.
|Apple profit soars on huge iPhone and Mac sales|
|Facebook tells DEA: Stop impersonating users|
|'I bought a house for $1,000'|
|She's America's youngest female billionaire - and a dropout|
|How to make $2.7 billion in a week|