Where's your house's Wifi hottest? This free Wi-Fi heat mapper will tell you...

Minty White - HeatMapper Maps Wi-fi Signal Strength for Your Wireless Network

PROS: This free tool helps you identify “cold” spots in your home/office. Easy to use and does not require a location-aware PC setup.

CONS: You have to sign up with your email address to get to the download but you can unsubscribe any time. You’ll need to use a laptop to take readings throughout your home.

VERDICT: If you’re a geek and you want a map of wi-fi signal strength in your home, this application will do exactly that.

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That's just cool... I need to get this and wander around my house and yard with my notebook heat mapping my Wifi and earn a "ZOMG,  you're a geek" achievement. :P