The Google Blog announced that when you conduct searches at Google.com for local specific information, you may get local reviews and business comparisons. For example a search on pizza 10010 returns three results, all with five stars, from pizza restaurants in NYC. Here is a screen capture:
It also works with movies 10010.
On the business front, a search on web 10901, brings up a local result for my business (RustyBrick) and two of my competitors, with no reviews.
Other search engines return similar results. For example, Ask.com for a search on pizza 10010 brings up 3 local results with refinements at the bottom that direct you to Ask City with reviews and more. Also, Yahoo Search has reviews and three local listings for a search on pizza 10010.