What's the best season for investing? What do Amazon.com (NASDAQ:AMZN), Blue Nile (NASDAQ:NILE), DryShips (NASDAQ:DRYS), Google (NASDAQ:GOOG), Select Comfort (NASDAQ:SCSS), and XM (NASDAQ:XMSR) have in common? Should investors buy China? And just how important is the iPhone to Apple (NASDAQ:AAPL)? In this installment of "Fool Video," Online Managing Editor LouAnn DiCosmo discusses some stories on the Fool radar.