Google Spreadsheets Work with Google Finance | July 13, 2007
by Jeb Boniakowski
Using the GoogleFinance function in a Google Spreadsheet, you can have automatically-updated financial data from Google finance in your spreadsheet.
I haven't actually had the time to play with this yet, but my bet is that this could be really useful in conjunction with Proto. I wonder how it interacts with the spreadsheet API. You could use this as a sort of 'watchlist' for certain securities and then pull down updated data into Proto using Google Spreadsheets components.