• Laptop warranties pay for themselves -- taking into consideration a 20% failure rate, a 10% accident rate and the near-certainty that the battery will die. [Gadgetwise]

• Many economists believe tax deductions for mortgage interest are a bad idea. Here's the history behind the deduction and why it does no one a favor. [NPR]

• This really cool time-lapse map shows a really uncool thing: How unemployment has infected America, on a county-by-county basis, since January 2007. [American Observer]

• Warren Buffett and George Soros are betting on retail giant Wal-Mart. But that doesn't signal the resurgence of the retail industry, nor does it mean that you should invest in retail yourself. [The Motley Fool]

• Coin collectors haven't, uh, changed their minds about the value of numismatics. Rare coins are more popular than ever. [WalletPop]

Follow More Money on Twitter at http://twitter.com/moremoneyblog.