count unique numbers in excel

well now for something completely different and utterly boring (but sometimes oh so useful): how do i count the number of unique numbers i have in a set in an excel sheet? some googling gave me a formula to apply (from http://www.officearticles.com/excel/count_unique_values_in_microsoft_excel.htm) but that didn’t really fly in excel 2007. so i changed it a bit. […]