Is it a good time to buy? Will an XM (Nasdaq: XMSR)/Sirius (Nasdaq: SIRI) marriage lead to better reception on Wall Street? Which company will take home the top prize in Stock Madness: Canadian National Railway (NYSE: CNI), Google (Nasdaq: GOOG), Starbucks (Nasdaq: SBUX), or Apple (Nasdaq: AAPL)? And are Advanced Micro Devices (NYSE: AMD) and Dell (Nasdaq: DELL) really ready to rebound? In this installment of "Fool Video," Chris Hill talks about some stories on the Fool Radar.