Here are some places to keep up with the news and trends in Local Search:

The Kelsey Group

A blog by the giant Kelsey Group that fouces on Local Search verticals and Internet Yellow Pages.

Yellow Pages Association

Exactly what the name implies – the website of the Yellow Pages trade association.

Local Search Guide

This resource is the Who’s Who of Local Search. It’s a combined effort of SEMPO (Search Engine Marketing Professionals Organization), The Kelsey Group, the Yellow Pages Association and comScore.