Otherwise, this is a great, free way to keep on top of breaking news. ESPN ScoreCenter (also free) will soon get a similar push feature, pinging you every time some overpaid jock makes a basket, scores a goal or hits a home run. Vital for sports fans.

Price: $5.99From: NGMoco Inc.

From the same company that brought out other amazingly creative offerings like Dropship and Rolando comes this . Not only does it benefit from the iPhone 3GS's souped-up CPU and GPU chips, but it uses push notifications to send out challenges to friends and other Star Defense players within virtual earshot.

The Nintendo DS family of handheld game devices were immensely successful in their P2P play over Wi-Fi. There's no reason the iPhone and the iPod Touch can't also grow into using peer-to-peer/player-to-player networking for collaboration and challenges, opening up new modes of gameplay and productivity. One hopes.