Heavy lifting done by pre-existing applications or code libraries with each stage acting on naturally expressed representations of data from the preceding stage in the pipeline Mashups as pipelines…
Google Apps as a mashup environment Scripted integration of Google Apps Glue in “free form” data driven mashups
Collect/backup tweets in a Google Spreadsheet [Twitteralytics v2] Linking a Google Form with data from the responses in the Spreadsheet [Event/Resource Booking] gEVS – An idea for a Google Form/Visualization mashup for electronic voting The best Google Spreadsheet Event Manager (w/h Sites, Contact, Calendar integration) ever, ever, ever Convert time stamped data to timed-text (XML) subtitle format using Google Spreadsheet Script
The art of the mashup lies in breaking a problem down into a series of discrete functional steps, each of which can be handled by something that already exists.