TouchCall allows you to browse through business listings by category for major cities. So far only New York, Boston, Chicago, and San Francisco are covered, but they promise more cities are coming soon!

<a href="http://local.ingenio.com/TouchCall/" title="Local Business Search for iPhone" target="_blank"><img src="http://www.modmyi.com/images/apps/touchcall.png" border="0" height="350" width="314" /></a>

<a href="http://local.ingenio.com/TouchCall/" title="Local Business Search for iPhone" target="_blank">http://local.ingenio.com/TouchCall/</a>