Wonderful work. The two things stopping 5 stars at the moment is documentation (none of the functions that the user must call have any help contents) and the 1-cell-at-a-time functionality only.
It would be very advantageous to supply similar functionality to xlsread/xlswrite, which both accept a cell range to read/write, and if no range is given, xlsread simply returns the full contents of that worksheet.
Really great functions! what is missing for me is a "editWorksheetCellBatch" function to be able to edit larger worksheets quicker.
I can see, that the Google API should support it:
I have tried making the function myself, but my experience with java and html protocols is very limited. I keep getting an error 400 (Bad Request) when i try to send the data to the server (ps.print(event)).