Yahoo Pipes is also capable of integrating csv-files and with this becomes interesting for statistics (globalizes official statistics).
Another one for UK Cities
This example used an interesting workflow the author describes with all details:
‘So to recap, we have scraped some data from a wikipedia page into a Google spreadsheet using the =importHTML formula, published a handful of rows from the table as CSV, consumed the CSV in a Yahoo pipe and created a geocoded KML feed from it, and then displayed it in a YahooGoogle map. ‘