Citysearch just announced that it has launched a complete reengineering of of its entire site (Beta). The new site drills deeper into neighborhoods, uses Facebook Connect as an optional identity system, and lets users vote reviews up and down.
The main changes to city search include:
1. Hyper-local content.
2. Hyper-social content (Facebook Connect).
3. Rebalancing the power between reviewers, merchants, and editors.
4. A better mobile experience
The changes are covered in greater detail on techcrunch with includes a video interview with Citysearch CEO Jay Herratti.