Move over Blockbuster (NYSE: BBI), Marvel (Nasdaq: MVL), Motorola (NYSE: MOT), and Time Warner (NYSE: TWX); shareholder activist Carl Icahn has a new target in his sights. So will Icahn's latest demands produce big returns for Yahoo! (Nasdaq: YHOO) investors? In this installment of "Fool Video," Motley Fool senior analyst Seth Jayson gives his take on Yahoo! and Microsoft (Nasdaq: MSFT), Online Managing Editor LouAnn DiCosmo talks Craigslist vs. eBay (Nasdaq: EBAY), and we highlight five stocks approaching greatness.