This great piece from Fast Company tells the story of how people are using entrepreneurial ventures to transform Detroit.

From the small:

Barry's shop consists of clothes and knickknacks by local designers--an example of entrepreneurs buying goods from other entrepreneurs, feeding the new economic machine. Barry, 28, also runs "I Am Young Detroit,"

To the large:

Dan Gilbert, the founder and chairman of Quicken Loans, the third-largest mortgage provider in the country; he moved 1,700 employees downtown in 2010, giving him 7,000 employees there and making him Detroit's third-largest landowner (trailing only the city and General Motors). With slicked-back hair and a perpetual poker face, Gilbert has just gotten started on his plan to transform the area.

Read how these stories show that Detroit, for all its problems, is undervalued and profit potential exists.