2007 photograph of Yahoo billboard in front of a ticker mentioning Microsoft news by Mark Lennihan/AP Giving business analysts something to talk about besides the economy, Microsoft has made an unsolicited $44.6 billion bid for Yahoo!. The offer is at $31/share, which is 62% more than Yahoo's closing price. Microsoft hopes to create efficiencies by teaming up to compete with Google. However, Pioneer Investments fund manager Thomas Radinger told Bloomberg News, "Microsoft is under......