Create quizzes in Google Docs spreadsheets.
The spreadsheet permission are set to public (read-only) spreadsheet so that YQL can access it.
Enable "Publish to web" for the spreadsheet using CSV format.
Create separate sheets for each quiz. You can also use a sheet to list and link to available quizzes.
YQL is used to query and parse the Google docs spreadsheet CSV to JSON used by jQwiz.