Where is a good tutorial to use Google Spreadsheets?

Question

The help system of Google Spreadsheets is a bit short (to put it nicely). Are there any good tutorials / documentation to explain a non-Excel-savy user how the formulas work, how one should use them (examples) and so on and so forth?

Answer 1

By far not a complete answer, but a start -

Here is a nice tutorial for google forms:

http://www.youtube.com/watch?v=IzgaUOW6GIs

From the google youtube user: http://www.youtube.com/user/Google

Answer 2

Atomic Learning has a very nice tutorial site for Google Spreadsheets (and other apps).