Most standard search engines and directories have a local version for different countries. Search Engine Colossus has a nice international directory of search engines.

As you would guess, some search engines are better than others and work differently, too. They also have different criteria for inclusion. Some may demand that the site be in the local language, others demand a local URL, and still others expect the company to be incorporated locally. These are some of the challenges you'll face as you conduct SEO for different country sites.

Another important point: Google results, for instance, may differ from country to country. Just because you've achieved a certain rank for targeted keywords for the U.S. doesn't mean you'll achieve the same results for France, for instance.

Get the full story at ClickZ Part 1 / Part 2