Google may have more need to use a kill switch than Apple. That's because Apple vets applications before putting them into its Apps Store. Anything goes in Google's Android Market, opening the chances of malicious or otherwise unwanted applications appearing in the market.

The Android Market business and program policies also include an item that says users can return any application for a full refund within 24 hours of the time of purchase. In the absence of a trial version of applications, this offer will let users return an application that might not deliver exactly what they expected.

Android Market users can also reinstall as many times as they wish an application that they buy, another useful feature in case a phone fails.

For now, all applications in the market are free because Google hasn't yet set up the mechanisms to allow developers to offer them for purchase.

People around the world -- phone users or not -- might also be pleased to learn about this item listed in the Android Market terms of service, in all caps for extra effect: "None of the products are intended for use in the operation of nuclear facilities, life support systems, emergency communications, aircraft navigation or communication systems, air traffic control systems or any other such activities in which case the failure of the products could lead to death, personal injury, or severe physical or environmental damage."