Today’s Author: Joe Chirilov , a program manager on the who has done a lot of work on both the Excel and Excel Services teams. Joe is going to discuss a spreadsheet he recently built using Excel 2007. Recently a large group of friends and I went on a multi-city tour of Europe that lasted a couple weeks. We had a blast, but that’s a conversation for another day. There was a lot of planning that went into this trip and responsibilities for booking different legs of the trip were spread out across the...