Watch out Wal-Mart, Aldi is ready to storm the US

Up until very recently, Wal-Mart had looked unbeatable. Nobody could touch it: Not the recession, not competitors, not its own employees and their various lawsuits. But now it seems the veneer is cracking,and the Wall Street Journal (subscription required), for one, is piling on with the speculation that Aldi may topple the giant retailer.

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The main basis of this bold prediction is that Aldi, a German-based discount supermarket that has outlets in 18 countries, mostly in Europe, beat back Wal-Mart in Germany so badly that Wal-Mart abandoned its plans there two years ago because shoppers found their goods too expensive.

What could possibly make a store less expensive than Wal-Mart?