Unsure whether IAC/InterActiveCorp is over- or undervalued at $24 a share? Kiplinger takes a quick look at Barry Diller's far-flung empire, hinting that investors should keep in mind Diller's track record as a deal-making "dot-com mogul" and a close eye on the company's travel-related businesses. Wall Street analysts are now predicting that IAC/InterActiveCorp will turn the corner in 2005, with the stock price rising to $31 or even $34 a share.

Fast Company also has a nice overview on how the various parts of the IAC/InterActiveCorp empire fit together: "Barry Diller's InterActiveCorp aims to acquire top businesses in a bunch of markets, then get them to work together to build a winning suite of online brands. So many companies crash on the rocks trying to create synergies. How do IAC's leaders do it?" There's commentary from a number of executives who run some of Diller's highest-profile businesses (Match.com, Hotwire, Evite, Hotels.com, LendingTree).