What is a mashup?

Developers are getting creative, taking APIs from multiple Websites and merging them to form new, innovative applications. Frozenbear.com merges Google maps and Singles to let you know where the single people are in your neighborhood. Parkingcarma.com helps you track down parking spaces in the Bay Area. ZDNet Executive Editor David Berlind says mashups are the fastest growing ecosystem on the Web and that by 2007, there will be 10 new mashups per day.