CitySearch An online equivalent of the local yellow pages, enhanced with links to merchant websites and customer reviews. 

Craigslist What started as a local, non-profit, online community billboard has become the ubiquitous international community billboard. With sites for many of the major cities in the world, Craig’s List has become an effective substitute for the local classifieds, while staying true to its grass-roots beginnings.  

Google Local Search One of the most promising local search sites out there, with plenty of unique features.