Thanks to the built-in accelerometer, you can Shake to Shuffle your music on the new iPod nano (4th generation) or shake iPhone or iPod touch to have Urbanspoon recommend a nearby restaurant. “Game designers” and other app developers “have been having a field day making use of the accelerometer,” notes Jefferson Graham (usatoday.com). And the fun has just begun.

Thanks to Grocery iQ ($4.99), you may never have to write another shopping list. Now you can tap to quickly build a comprehensive and highly legible list on iPhone or iPod touch, arrange your list by aisle to match the layout of your grocery store, check off items as you add them to your cart, build a purchase history and a list of favorites. Grocery IQ even lets you email your list to a designated shopper.