... application that runs on BlackBerry, Android and Windows Mobile devices for now. While so many of us focus on throughput, it’s only part of the equation — equally as important is the signal strength, dropped calls, and failed data connections.
ArticleRoot Wireless aggregates data from the reporting handset clients to create detailed, low-level coverage maps.
Edit: Article is out of date/inaccurate: Root Mobile runs on RIM and Android. Apple and Windows Mobile phones will be supported in future releases.