War Driving just got easier: MacWireless has released a keychain-sized WiFi finder called MacWireless WiFinder.
WiFi finders can detect open WiFi networks, and MacWireless says that its unit can "distinguish between a wireless network and other devices that produce the same frequency, such as a cordless phone or a microwave oven."
In addition, the deviceis LEDs can be used to determine direction as signal strength is measured in a directional manner.
MacWireless WiFinder is priced at US$34.98, and is available now. You can find more information at the companyis Web site.