There was a recent contest with PowerPivot,
Office 2007 Serial, see the details of the contest here: There were some great PowerPivot reports submitted,
Microsoft Office 2010 Key, including some from our MVPs: Bill Jelen created a “Tag Cloud & SmartArt Updated Via PowerPivot!” report: Tushar Mehta created a “Visualize US population trends over the last 150 years” report:
Update: Unfortunately the site with the entries is down,
Office Enterprise 2007, I’ll update this if we get another link to them. …And on a kind of similar note,
Office Professional, if you haven’t taken the Excelerator quiz yet,
Microsoft Office Enterprise 2007, give it a go: