I've been reading a lot of SEO articles about Vertical Search Engines and how they are becoming more important. I understand the concept of Vertical SE's vs General SE's. What are some examples of Good Vertical SE's that are worth listing in.
Vertical Search Engines?? I'm googling that. Edit: http://en.wikipedia.org/wiki/Vertical_search Vertical Search Engine Examples: AhZing Vertical Search Engine: http://ahzing.com