" I frequently use Google Spreadsheets as a lightweight database, by setting up some columns, encouraging my colleagues to update it, and subscribing to notifications of changes. Then I export the spreadsheet as JSON and update a json file in our codebase. Sometimes I also just use the jsonp output of a published spreadsheet, but if I'm worried about performance or the information getting mis-updated, then I'll use the export-and-update approach. In order to export it as JSON, I used to use a Google Spreadsheets Gadget but now that those are deprecated, I use a Google Apps Script."
Via Martin Hawksey