Coded in 24 hours at the Muther of all Hackathons in Silicon Valley this mobile web app finds nearby businesses by searching Facebook Fan Pages. It won its co-creators a pair MacBook Airs as the best mashup using fitml.com's cross-platform mobile web platform.
Clicking a search result displays the businesses address, click to call phone number and a mobile formatted view of their Facebook Wall and Twitter timeline
The cross platform app works only in browsers with geolocation support, there's no option to input an address or zipcode. I've confirmed it works with the iOS, Android, and bada browsers and with Opera Mobile 10.1 and latter. I suspect it will also work with othe geolocation aware browsers including the Maemo and Meego Harmattan browsers and with BlackBerry browsers since OS 4.1