YAWA

YAWA runs a WiFi test, rates the hotspot's quality, and tells you what you'll be able to do in your location (email, web browsing, video conferencing, etc).

A couple more clicks save the results to the map for everyone to see. Happy, meh, and sad smiley icons tell you how useful each hotspot is (or how happy you'll be with their connection). Clicking a hotspot shows its name and a text description that explains what it's good for.