Today’s blog post is brought to you by Judi Hurlock, who writes Excel online training for Office.com. I write free training courses for Office.com. My job is to learn new features, and the tried and true, and to pass that learning on to you. Recently I heard about a new feature in Excel 2010 called sparklines. I couldn’t tell just by the name what the feature was. But when I found out that a sparkline is a tiny chart, the proverbial light bulb turned on, and I realized this was something...