Google docs keeps getting cooler

Google docs keeps getting cooler; I was thinking of creating a simple application to add data to a spreadsheet using some kind of form, but Google beat me to it: http://googlesystem.blogspot.com/2008/02/add-data-to-google-spreadsheets-using.html

It's dead simple to create a data entry form, making it kind of pointless for me to create an expense application that adds data the spreadsheet, I just need to create a form on my cash book spreadsheet. Sweet!