Spreadsheet that starts 'empty' and grows as you enter data - is there such a beast?

[Chris Green]

I'm after a spreadsheet that starts in a sort of minimal mode and that
you have to grow as you enter data.

I just want five columns and one or more rows with the number of rows
simply increasing as you enter more data.

I don't want zillions of empty columns and rows (or hidden 'tables') and
I don't really want big complex toolbars either.

Can anyone suggest anything that might fulfil this need?

-- 
Chris Green