Check out Mike Antoniak's post on Smarter Agent. Mike covers technology for the National Association of Realtors and supplements his articles with his blog RealTechTools.

Five Questions About Smarter Agent
Most think of GPS as a navigation tool, but one company is using that technology as the basis for of location-based property searches on mobile devices. Smarter Agent is a carrier approved, GPS-powered tool which enables consumers to search and retrieve property information on their cell phone or other handset, based on where they are. It was developed by co-founders and brothers Brad(CEO) and Eric Blumberg ( CTO and president). The Blumbergs have an insiders’ understanding of how technology can best serve the needs of today’s mobile real estate professionals and clients... See the rest of the post on RealTechTools.