Web Forum

Google

THE search engine. This is for discussion about Google as a company, not for discussion of individual sites (SEO, PageRank for a site or "why a site ranks where it does" questions) or Google search results.

Yahoo

For anything related to Yahoo as a company or their search engine.

Microsoft

For discussion of Microsoft (as a company) and their search engine that powers the MSN search.

All Other Search Engines

Any search engine without their own forum, can be discussed here.

Directories

Directories (such as DMOZ/ODP, Google Directory, Yahoo Directory, etc.) can be discussed here. This is only for sites that are only directories, not sites that have a directory somewhere within them.