I just found Excel Unusual, which has been going since September this year. Here’s what the Author says:
“Finding engineering work quite un-challenging lately I decided to start this blog in which to share cool ways of solving engineering problems or just interesting modeling of natural phenomena in MS Excel 2003. I use mainly cell formulas with minimum of VBA in order to take advantage of the ease of “programming” and the native speed of the Excel spreadsheet.”
He has some amazing stuff on there, including this Excel generated simulation of a roller coaster:
Have a look!