Check out our slideshow (below) to see the top five rising stars in technology, according to Fortune. Then click here to visit Fortune's complete list of the top 40 business leaders under 40 years old. Also take a look our slideshow of the World Economic Forum's Technology Pioneers of 2011 and the richest techies in the U.S.
Vote for your favorite tech star, then share your opinions on the list in the comments below. Who would you have included?