A mashup is a website or Web 2.0 application that uses content from more than one source to create a completely new service. Mapping mashups use online mapping services, such as those offered by Google or Yahoo, to display customized, clickable markers showing points of interest and related information. �

Learner Applications: Collect information, identifying useful information, organize information, communicate information

Instructor Applications: Present information, observe student work, assess�

Examples:

• Nestoria - UK map + real estate.

• Sailtimer - Sailing time + location.
• Global incident map Bableplex - Suspicious/terrorist acts + map.
• Flickr Sudoko - Flickr letters + sudoko puzzle.
• Twittervision - Twitter (a micrblogging service) is combined with an interactive geographical map.

Services:

• Flickr - Essentially a photo sharing service that is used with many different types of mashups.

• Services geared to build mashups for non-programmers.
  

Successful Practices:

References:
7 things you should know about mapping mashups from EDUCAUSE.