A digital photograph is ultimately nothing more than a series of numerical colour values, which makes it ideal for presentation as a spreadsheet. The Pixel Spreadsheet service does just that, letting you upload a picture and then converting it into a downloadable Excel spreadsheet.
Matt Barry designed the original code, which was then tweaked by the team at Think Maths to create a webapp. It converts each colour number into a conditional display function which renders the relevant RGB values.
The picture I uploaded to test the service is shown at the right. Obviously, a fair bit detail is lost when you choose to pixelate spreadsheet style, but the result is still impressive.
Alright, I'll admit it -- there aren't terribly many obvious contexts where a lower-resolution spreadsheet version of a picture is more useful than the picture itself. However, it's a reminder that VBA can be used for a lot more than just basic financial calculations.