Artist Alexander Chen has turned New York city's subway map into a digital work of musical art—that you can play.

An exhibit at The New Museum explores the growing impact of the Internet on artistic expression. “Free” opened this week with contributions from 22 contemporary artists from a range of disciplines—including sculpture, photography, collage, installation, and video.

They're using mobile phones for talking, texting, e-mailing, playing video games, and now...fine art.